This is a chronological listing of the United States Senators from Pennsylvania

Pennsylvania

The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

.

United States Senators

United States Senate

The United States Senate is the upper house of the bicameral legislature of the United States, and together with the United States House of Representatives comprises the United States Congress. The composition and powers of the Senate are established in Article One of the U.S. Constitution. Each...

 are popularly elected, for a six-year term, beginning January 3. Elections are held the first Tuesday after November 1. Before 1914, they were chosen by the Pennsylvania General Assembly

Pennsylvania General Assembly

The Pennsylvania General Assembly is the state legislature of the U.S. state of Pennsylvania. The legislature convenes in the State Capitol building in Harrisburg. In colonial times , the legislature was known as the Pennsylvania Provincial Assembly. Since the Constitution of 1776, written by...

, and before 1935, their terms began March 4.

Class 1

Class 1 U.S. Senators

Classes of United States Senators

The three classes of United States Senators are currently made up of 33 or 34 Senate seats. The purpose of the classes is to determine which Senate seats will be up for election in a given year. The three groups are staggered so that one of them is up for election every two years.A senator's...

 belong to the electoral cycle that were elected for one session of the U.S. Congress in the first election of 1788 and whose seats in recent years are contested in 1994

United States Senate election in Pennsylvania, 1994

The 1994 United States Senate election in Pennsylvania was held on November 8, 1994. Incumbent Democratic U.S. Senator Harris Wofford, who was recently appointed to the position in 1991, decided to seek re-election to a full six year term, but was defeated by Republican Rick Santorum.- Democratic...

, 2000

United States Senate election in Pennsylvania, 2000

The 2000 United States Senate election in Pennsylvania was held on November 7, 2000. Incumbent Republican U.S. Senator Rick Santorum won re-election to a second term.-Campaign:...

, 2006, and 2012

United States Senate election in Pennsylvania, 2012

The 2012 United States Senate election in Pennsylvania will be held on November 6, 2012 alongside a presidential election, other elections to the United States Senate in other states, as well as elections to the United States House of Representatives and various state and local elections. Incumbent...

.

#	Senator	Party	Years	Congress	Term	Electoral history
1	William Maclay	Anti-Administration Anti-Administration Party (United States) Anti-Administration "Party" was the informal faction comprising the opponents of the policies of Treasury Secretary Alexander Hamilton in the first term of President George Washington. This was not an organized political party but an unorganized faction...	March 4, 1789 – March 3, 1791	1 1st United States Congress -House of Representatives:During this congress, five House seats were added for North Carolina and one House seat was added for Rhode Island when they ratified the Constitution.-Senate:* President: John Adams * President pro tempore: John Langdon...	1	Elected in 1789 Lost re-election
Vacant			March 4, 1791 – December 1, 1793	2 2nd United States Congress -House of Representatives:During this congress, two new House seats were added for each of the new states of Vermont and Kentucky. -Leadership:-Senate:*President: John Adams *President pro tempore:** Richard Henry Lee...	2
				3 3rd United States Congress The Third United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives...
2	Albert Gallatin Albert Gallatin Abraham Alfonse Albert Gallatin was a Swiss-American ethnologist, linguist, politician, diplomat, congressman, and the longest-serving United States Secretary of the Treasury. In 1831, he founded the University of the City of New York...	Anti-Administration Anti-Administration Party (United States) Anti-Administration "Party" was the informal faction comprising the opponents of the policies of Treasury Secretary Alexander Hamilton in the first term of President George Washington. This was not an organized political party but an unorganized faction...	December 2, 1793 – February 28, 1794			Elected late in 1793 Election voided on the grounds that he had not met the residency requirements for eligibility to the office.
Vacant			March 1, 1794 – April 23, 1794
3	James Ross	Federalist Federalist Party (United States) The Federalist Party was the first American political party, from the early 1790s to 1816, the era of the First Party System, with remnants lasting into the 1820s. The Federalists controlled the federal government until 1801...	April 24, 1794 – March 3, 1803	3 3rd United States Congress The Third United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives... (Continued)		Elected to finish Gallatin's term
				4 4th United States Congress -House of Representatives:- Senate :* President: John Adams * President pro tempore:** Henry Tazewell , first elected December 7, 1795** Samuel Livermore , first elected May 6, 1796** William Bingham , first elected February 16, 1797...
				5 5th United States Congress The Fifth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives...	3	Re-elected in 1797
				6 6th United States Congress The Sixth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met at Congress Hall in Philadelphia, Pennsylvania and in Washington, D.C. from March 4, 1799...
				7 7th United States Congress - House of Representatives :-Senate:* President: Aaron Burr * President pro tempore:** Abraham Baldwin , first elected December 7, 1801** Stephen R. Bradley , first elected December 14, 1802-House of Representatives:...
4	Samuel Maclay Samuel Maclay Samuel Maclay was an American surveyor, farmer, and politician from Union County, Pennsylvania. He served in the state legislature and represented Pennsylvania in both the U.S. House and the United States Senate.-Biography:...	Democratic- Republican Democratic-Republican Party (United States) The Democratic-Republican Party or Republican Party was an American political party founded in the early 1790s by Thomas Jefferson and James Madison. Political scientists use the former name, while historians prefer the latter one; contemporaries generally called the party the "Republicans", along...	March 4, 1803 – January 4, 1809	8 8th United States Congress - Senate :* President: Aaron Burr * President pro tempore: John Brown , October 17, 1803 – February 26, 1804** Jesse Franklin , March 10, 1804 – November 4, 1804** Joseph Anderson , January 15, 1805 – December 1, 1805- House of Representatives :...	4	Elected in 1803 Resigned, believing he would lose re-election
				9 9th United States Congress - Senate :* President: George Clinton * President pro tempore: Samuel Smith - House of Representatives :* Speaker: Nathaniel Macon -Members:This list is arranged by chamber, then by state...
				10 10th United States Congress - House of Representatives :- Senate :*President: George Clinton *President pro tempore: Samuel Smith , elected April 16, 1808** Stephen R. Bradley , elected December 28, 1808** John Milledge , elected January 30, 1809...
Vacant			January 4, 1809 – January 9, 1809
5	Michael Leib Michael Leib Michael Leib was an American physician, politician, scientist, inventor, statesman, and philosopher born in Philadelphia, Pennsylvania. He served Pennsylvania in both houses of the state legislature and represented Pennsylvania in both the U.S...	Democratic- Republican Democratic-Republican Party (United States) The Democratic-Republican Party or Republican Party was an American political party founded in the early 1790s by Thomas Jefferson and James Madison. Political scientists use the former name, while historians prefer the latter one; contemporaries generally called the party the "Republicans", along...	January 9, 1809 – February 14, 1814	10 10th United States Congress - House of Representatives :- Senate :*President: George Clinton *President pro tempore: Samuel Smith , elected April 16, 1808** Stephen R. Bradley , elected December 28, 1808** John Milledge , elected January 30, 1809... (Continued)		Elected to finish Maclay's term
				11 11th United States Congress - House of Representatives :-Leadership:- Senate :* President: George Clinton * President pro tempore:** John Milledge ** Andrew Gregg , elected June 26, 1809** John Gaillard , elected February 28, 1810...	5	Elected in 1809 Resigned to become Postmaster of Philadelphia
				12 12th United States Congress - House of Representatives :During this congress, one new House seat was added for the new state of Louisiana.- Senate :*President: George Clinton *President pro tempore: William H. Crawford -House of Representatives:*Speaker: Henry Clay...
				13 13th United States Congress - Senate :* President: Elbridge Gerry , until November 23, 1814, thereafter vacant.* President pro tempore: Joseph B. Varnum , December 6, 1813 – February 3, 1814** John Gaillard , elected November 25, 1814- House of Representatives :...
6	Jonathan Roberts Jonathan Roberts Jonathan Roberts was a United States Representative and Senator from Pennsylvania from 1811 to 1814 and 1814 to 1821 respectively.-Life and career:...	Democratic- Republican Democratic-Republican Party (United States) The Democratic-Republican Party or Republican Party was an American political party founded in the early 1790s by Thomas Jefferson and James Madison. Political scientists use the former name, while historians prefer the latter one; contemporaries generally called the party the "Republicans", along...	February 24, 1839 – March 3, 1821			Elected to finish Leib's term
				14 14th United States Congress - Senate :* President: Vacant* President pro tempore: John Gaillard of South Carolina, first elected December 4, 1815- House of Representatives :* Speaker: Henry Clay of Kentucky-Members:This list is arranged by chamber, then by state...	6	Re-elected in 1815
				15 15th United States Congress -Leadership:- Senate :* President: Daniel D. Tompkins * President pro tempore:** John Gaillard , elected March 4, 1817** James Barbour , elected February 15, 1819- House of Representatives :*Speaker: Henry Clay -Members:...
				16 16th United States Congress -House of Representatives:During this congress, one House seat was added for the new state of Alabama and one seat was reapportioned from Massachusetts to the new state of Maine. For the beginning of the next congress, six more seats from Massachusetts would be reapportioned to...
Vacant			March 4, 1821 – December 10, 1821	17 17th United States Congress The Seventeenth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1821 to March 3, 1823, during the fifth and sixth...	7	Legislature failed to elect
7	William Findlay	Democratic- Republican Democratic-Republican Party (United States) The Democratic-Republican Party or Republican Party was an American political party founded in the early 1790s by Thomas Jefferson and James Madison. Political scientists use the former name, while historians prefer the latter one; contemporaries generally called the party the "Republicans", along...	December 10, 1821 – March 3, 1827			Elected late in 1821 Retired
		Jacksonian Republican Democratic-Republican Party (United States) The Democratic-Republican Party or Republican Party was an American political party founded in the early 1790s by Thomas Jefferson and James Madison. Political scientists use the former name, while historians prefer the latter one; contemporaries generally called the party the "Republicans", along...		18 18th United States Congress The Eighteenth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1823 to March 3, 1825, during the seventh and eighth...
		Jacksonian		19 19th United States Congress -House of Representatives:-Leadership:- Senate :* President: John C. Calhoun * President pro tempore: John Gaillard , until December 4, 1825** Nathaniel Macon , from May 20, 1826- House of Representatives :* Speaker: John W. Taylor -Members:...
8	Isaac D. Barnard Isaac D. Barnard Isaac Dutton Barnard was an American Senator from Pennsylvania. He moved to a farm near Chester with his parents, and was a scholar at several public schools. He later resided in Philadelphia until 1811, when he moved back to Chester...	Jacksonian	March 4, 1827 – December 6, 1831	20 20th United States Congress -House of Representatives:-Leadership:- Senate :* President: John C. Calhoun * President pro tempore: Samuel Smith - House of Representatives :* Speaker: Andrew Stevenson -Members:This list is arranged by chamber, then by state...	8	Elected in 1827 Resigned to due ill health
				21 21st United States Congress -House of Representatives:-Leadership:- Senate :* President: John C. Calhoun * President pro tempore: Samuel Smith - House of Representatives :* Speaker: Andrew Stevenson -Members:This list is arranged by chamber, then by state...
Vacant			December 6, 1831 – December 13, 1831
9	George Mifflin Dallas	Jacksonian	December 13, 1831 – March 3, 1833	21 21st United States Congress -House of Representatives:-Leadership:- Senate :* President: John C. Calhoun * President pro tempore: Samuel Smith - House of Representatives :* Speaker: Andrew Stevenson -Members:This list is arranged by chamber, then by state... (Continued)		Elected to finish Barnard's term Retired
				22 22nd United States Congress -House of Representatives:-Leadership:- Senate :* President:** John C. Calhoun , resigned December 28, 1832, thereafter vacant.* President pro tempore:** Samuel Smith , first elected December 5, 1831** Littleton W...
10	Samuel McKean Samuel McKean Samuel McKean was an American merchant and politician from Burlington, Pennsylvania. He served in the Pennsylvania House of Representatives from 1815 to 1819. He was in the Pennsylvania State Senate from 1829 to 1830....	Jacksonian	March 4, 1833 – March 3, 1839	23 23rd United States Congress -House of Representatives:For the beginning of this congress, the size of the House was increased from 213 seats to 240 seats, following the 1830 United States Census .- Leadership :- Senate :* President: Martin Van Buren...	9	Elected in 1832 United States Senate elections, 1832 The United States Senate election of 1832 was an election which had the Anti-Jackson coalition assume control of the United States Senate from the Jacksonian coalition, despite Andrew Jackson's victory in the Presidential election....
				24 24th United States Congress -House of Representatives:During this congress one House seat was added for each of the new states of Arkansas and Michigan.-Leadership:- Senate :* President: Martin Van Buren * President pro tempore: William R. King - House of Representatives :...
				25 25th United States Congress -House of Representatives:-Leadership:- Senate :* President: Richard Mentor Johnson * President pro tempore: William R. King - House of Representatives :* Speaker: James K. Polk -Members:This list is arranged by chamber, then by state...
Vacant			March 4, 1839 – January 14, 1840	26 26th United States Congress -House of Representatives:- Leadership :- Senate :*President: Richard M. Johnson *President pro tempore: William R. King - House of Representatives :*Speaker: Robert M.T. Hunter -Members:This list is arranged by chamber, then by state...	10	Legislature failed to elect
11	Daniel Sturgeon Daniel Sturgeon Daniel Sturgeon was an American physician, banker and Democratic party politician from Uniontown, Pennsylvania. He served in both houses of the state legislature and represented Pennsylvania in the United States Senate....	Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...	January 14, 1840 – March 3, 1851	26 26th United States Congress -House of Representatives:- Leadership :- Senate :*President: Richard M. Johnson *President pro tempore: William R. King - House of Representatives :*Speaker: Robert M.T. Hunter -Members:This list is arranged by chamber, then by state... (Continued)		Elected late in 1839
				27 27th United States Congress The Twenty-seventh United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1841 to March 3, 1843, during the one-month...
				28 28th United States Congress -House of Representatives:Following the 1840 United States Census, Congress reapportioned the House to include 223 seats . During this congress, one House seat was added for the new state of Florida .- Senate :*President: Vacant...
				29 29th United States Congress -House of Representatives:During this congress, two House seats were added for each of the new states of Texas and Iowa.-Leadership:-Senate:* President: George M. Dallas * President pro tempore: Willie P. Mangum...	11	Re-elected in 1844 United States Senate elections, 1844 The United States Senate election of 1844 was an election which, coinciding with James K. Polk's election, had the Democratic Party retake control of the United States Senate, gaining a net total of eleven seats from the Whigs....
				30 30th United States Congress The Thirtieth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1847 to March 3, 1849, during the last two years of...
				31 31st United States Congress The Thirty-first United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1849 to March 3, 1851, during the last 17 months...
12	Richard Brodhead Richard Brodhead Richard Brodhead was an American lawyer and politician from Easton, Pennsylvania. He represented Pennsylvania in both the U.S. House and Senate. He was the father of U.S. Representative Jefferson Davis Brodhead....	Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...	March 4, 1851 – March 3, 1857	32 32nd United States Congress The Thirty-second United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1851 to March 3, 1853, during the third and...	12	Elected in 1850 United States Senate elections, 1850 The United States Senate election of 1850 was an election which had the Democratic Party gain one seat in the United States Senate.As this election was prior to ratification of the seventeenth amendment, Senators were chosen by State legislatures....
				33 33rd United States Congress The Thirty-third United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1853 to March 3, 1855, during the first two years...
				34 34th United States Congress The Thirty-fourth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1855 to March 4, 1857, during the last two years...
13	Simon Cameron Simon Cameron Simon Cameron was an American politician who served as United States Secretary of War for Abraham Lincoln at the start of the American Civil War. After making his fortune in railways and banking, he turned to a life of politics. He became a U.S. senator in 1845 for the state of Pennsylvania,...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	March 4, 1857 – March 4, 1861	35 35th United States Congress The 35th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1857 to March 3, 1859, during the first two years of James...	13	Elected in 1856 United States Senate elections, 1856 The United States Senate election of 1856 was an election which had the young Republican Party assume its position as one of the United States's two main political parties.... Resigned to become U.S. Secretary of War
				36 36th United States Congress The Thirty-sixth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1859 to March 4, 1861, during the third and fourth...
				37 37th United States Congress The Thirty-seventh United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1861 to March 4, 1863, during the first two...
Vacant			March 4, 1861 – March 14, 1861
14	David Wilmot David Wilmot David Wilmot was a U.S. political figure. He was a sponsor and eponym of the Wilmot Proviso which aimed to ban slavery in land gained from Mexico in the Mexican-American War of 1846–1848. Wilmot was a Democrat, a Free Soiler, and a Republican during his political career...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	March 14, 1861 – March 3, 1863	37 37th United States Congress The Thirty-seventh United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1861 to March 4, 1863, during the first two... (Continued)		Elected in 1861 to finish Cameron's term Retired
15	Charles R. Buckalew Charles R. Buckalew Charles Rollin Buckalew was an American lawyer and Democratic party politician from Bloomsburg, Pennsylvania. He served in the state senate and represented Pennsylvania in both the U.S. House and Senate. He was a graduate of Harford Academy, Susquehanna County, Pennsylvania, where he studied law...	Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...	March 4, 1863 – March 3, 1869	38 38th United States Congress -House of Representatives:Before this Congress, the 1860 United States Census and resulting reapportionment changed the size of the House to 241 members...	14	Elected in 1862 United States Senate elections, 1862 The United States Senate election of 1862 was an election during the American Civil War in which Republicans increased their control of the U.S. Senate. The Republican Party gained three seats, bringing their majority to 66% of the body. Also caucusing with them were Unionists and Unconditional...
				39 39th United States Congress The Thirty-ninth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1865 to March 4, 1867, during the first month of...
				40 40th United States Congress The Fortieth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1867 to March 4, 1869, during the third and fourth...
16	John Scott John Scott (Pennsylvania) John Scott was an American lawyer and Republican party politician. He served in the Pennsylvania House of Representatives and represented Pennsylvania in the United States Senate....	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	March 4, 1869 – March 3, 1875	41 41st United States Congress -House of Representatives:- Senate :* President : Schuyler Colfax* President pro tempore: Henry B. Anthony - House of Representatives :* Speaker: James G. Blaine -Members:This list is arranged by chamber, then by state...	15	Elected in 1868 United States Senate elections, 1868 The United States Senate election of 1868 was an election which had the Republican Party gain five seats in the United States Senate, enlarging their already overwhelming majority.... Retired
				42 42nd United States Congress The Forty-second United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1871 to March 3, 1873, during the third and fourth...
				43 43rd United States Congress The Forty-third United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1873 to March 4, 1875, during the fifth and sixth...
17	William A. Wallace William A. Wallace William Andrew Wallace was an American lawyer and Democratic party politician from Clearfield, Pennsylvania. He served in the Pennsylvania State Senate and was its speaker in 1871. He represented Pennsylvania in the United States Senate from 1875 to 1881.After his U.S. Senate service Wallace was...	Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...	March 4, 1875 – March 3, 1881	44 44th United States Congress The Forty-fourth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1875 to March 4, 1877, during the seventh and...	16	Elected in 1874 United States Senate elections, 1874 The United States Senate election of 1874 was an election which had the Democratic Party gain nine seats in the United States Senate.As this election was prior to ratification of the seventeenth amendment, Senators were chosen by State legislatures.-Results:... Lost re-election
				45 45th United States Congress -House of Representatives:-Leadership:-Senate:*President: William A. Wheeler *President pro tempore: Thomas W. Ferry -House of Representatives:*Speaker: Samuel J. Randall -Members:This list is arranged by chamber, then by state...
				46 46th United States Congress The Forty-sixth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1879 to March 4, 1881, during the last two years of...
18	John I. Mitchell John I. Mitchell John Inscho Mitchell was an American lawyer, jurist, and Republican party politician from Tioga County, Pennsylvania. He served in the state legislature and represented Pennsylvania in both the U.S. House and Senate. He was later a judge in several state courts.-External links:* at Find A Grave...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	March 4, 1881 – March 3, 1887	47 47th United States Congress The Forty-seventh United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1881 to March 4, 1883, during the administration...	17	Elected in 1880 United States Senate elections, 1880 The United States Senate election of 1880 was an election which conicided with the presidential election of 1880, and which had the Democratic Party lose five seats in the United States Senate, causing it and the Republican Party to have the same number of seats, leading to a Senate without a...
				48 48th United States Congress The Forty-eighth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1883 to March 4, 1885, during the last two years...
				49 49th United States Congress The Forty-ninth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1885 to March 4, 1887, during the first two years...
19	Matthew S. Quay	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	March 4, 1887 – March 3, 1899	50 50th United States Congress The Fiftieth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1887 to March 4, 1889, during the third and fourth...	18	Elected in 1886 United States Senate elections, 1886 The United States Senate election of 1886 was an election which had the Republican Party lose three seats in the United States Senate.As this election was prior to ratification of the seventeenth amendment, Senators were chosen by State legislatures....
				51 51st United States Congress The Fifty-first United States Congress, referred to by some critics as the Billion Dollar Congress, was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C...
				52 52nd United States Congress The Fifty-second United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C...
				53 53rd United States Congress The Fifty-third United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1893 to March 4, 1895, during the fifth and sixth...	19	Re-elected in 1892 United States Senate elections, 1892 The United States Senate election of 1892 was an election which, corresponding with former President Grover Cleveland's return to power, had the Republican Party lose seven seats in the United States Senate and lose its majority to the Democratic Party.... Legislature failed to re-elect
				54 54th United States Congress - House of Representatives :-Leadership:- Senate :* President: Adlai E. Stevenson * President pro tempore: William P. Frye - Majority leadership :* Republican Conference Chairman: John Sherman- Minority leadership :...
				55 55th United States Congress -House of Representatives:* Republican: 206 * Democratic: 124* Populist: 22* Silver Republican: 3* Silver: 1* Independent Republican: 1TOTAL members: 357-Leadership:-Senate:* President: Garret Hobart * President pro tempore: William P...
Vacant			March 4, 1899 – January 16, 1901	56 56th United States Congress -House of Representatives:- Leadership :- Senate :* President: Garret Hobart , until November 21, 1899 , vacant thereafter.* President pro tempore: William P. Frye * Democratic Caucus Chairman: James K. Jones...	20	Quay was appointed to continue the term, but the Senate declared him not entitled to the seat
20	Matthew S. Quay	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	January 16, 1901 – May 28, 1904			Elected late in 1901 Died
				57 57th United States Congress -House of Representatives:*Democratic: 151*Republican: 200 *Populist: 5*Silver : 1TOTAL members: 357-Leadership:-Senate:* President: Theodore Roosevelt , until September 14, 1901, vacant thereafter....
				58 58th United States Congress - House of Representatives :* Republican : 209 * Democratic : 176* Silver Republican : 1TOTAL members: 386-Senate:* President: Vacant* President pro tempore: William P. Frye -Members:...
21	Philander C. Knox Philander C. Knox Philander Chase Knox was an American lawyer and politician who served as United States Attorney General , a Senator from Pennsylvania and Secretary of State ....	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	June 10, 1904 – March 4, 1909			Appointed to continue Quay's term Elected to finish Quay's term
				59 59th United States Congress The Fifty-ninth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1905 to March 4, 1907, during the fifth and sixth...	21	Re-elected in 1902 United States Senate elections, 1902 The United States Senate election of 1902 was an election which had the Republican Party and the Democratic Party each gain one seat in the United States Senate.... Resigned to become U.S. Secretary of State
				60 60th United States Congress The Sixtieth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1907 to March 4, 1909, during the last two years of...
				61 61st United States Congress The Sixty-first United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1909 to March 4, 1911, during the first two years of...
Vacant			March 4, 1909 – March 17, 1909
22	George T. Oliver George T. Oliver George Tener Oliver was an American lawyer, publisher, and Republican party politician from Pittsburgh, Pennsylvania. He represented Pennsylvania in the United States Senate...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	March 17, 1909 – March 3, 1917	61 61st United States Congress The Sixty-first United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1909 to March 4, 1911, during the first two years of... (Continued)		Elected to finish Knox's term
				62 62nd United States Congress - House of Representatives :* Democratic : 230 * Republican : 162* Socialist : 1* Independent : 1TOTAL members: 394-Senate:* President: James S...	22	Re-elected in 1911 Retired
				63 63rd United States Congress - House of Representatives:*Democratic : 291 *Republican : 134*Progressive : 9*Independent : 1TOTAL members: 435-Senate:*President of the Senate: Thomas R. Marshall*President pro tempore: James P. Clarke-Senate:...
				64 64th United States Congress The Sixty-fourth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1915 to March 4, 1917, during the third and fourth...
23	Philander C. Knox Philander C. Knox Philander Chase Knox was an American lawyer and politician who served as United States Attorney General , a Senator from Pennsylvania and Secretary of State ....	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	March 4, 1917 – October 12, 1921	65 65th United States Congress The Sixty-fifth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1917 to March 4, 1919, during the fourth and fifth...	23	Elected in 1916 Died
				66 66th United States Congress The Sixty-sixth United States Congress was a meeting of the legislative branch of the United States federal government, comprising the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1919 to March 4, 1921, during the last two years of...
				67 67th United States Congress The Sixty-seventh United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1921 to March 4, 1923, during the first two years...
Vacant			October 12, 1921 – October 24, 1921
24	William E. Crow William E. Crow Wiliam Evans Crow was an American lawyer and Republican party politician from Uniontown, Pennsylvania. He served in the Pennsylvania State Senate from 1907 until 1921 and was its President pro-tem in 1909-1911. In 1921 he was appointed to the United States Senate, after Senator Knox died in...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	October 24, 1921 – August 2, 1922			Appointed to continue Knox's term Died
Vacant			August 2, 1922 – August 8, 1922
25	David A. Reed David A. Reed David Aiken Reed was an American lawyer and Republican party politician from Pittsburgh, Pennsylvania. He represented Pennsylvania in the United States Senate....	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	August 8, 1922 – January 3, 1935			Appointed to continue Knox's term Elected both to finish Knox's term and to the next term
				68 68th United States Congress The Sixty-eighth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1923 to March 4, 1925, during the last months of...	24	Elected in 1922
				69 69th United States Congress The Sixty-ninth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1925 to March 4, 1927, during the third and fourth...
				70 70th United States Congress The Seventieth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1927 to March 3, 1929, during the last two years of...
				71 71st United States Congress The Seventy-first United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1929 to March 4, 1931, during the first two years...	25	Re-elected in 1928 Lost re-election
				72 72nd United States Congress The Seventy-second United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1931 to March 4, 1933, during the last two years...
				73 73rd United States Congress The Seventy-third United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1933 to January 3, 1935, during the first two years...
26	Joseph F. Guffey Joseph F. Guffey Joseph Frank Guffey was an American business executive and Democratic Party politician from Pittsburgh, Pennsylvania. He represented Pennsylvania in the United States Senate from 1935 until 1947.-Early life:...	Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...	January 3, 1935 – January 3, 1947	74 74th United States Congress -House:Also 2 Delegates, 3 Resident Commissioners-Senate:*President of the Senate: John N. Garner *President pro tempore: Key Pittman -Majority leadership:*Majority leader: Joseph T. Robinson...	26	Elected in 1934
				75 75th United States Congress The Seventy-fifth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1937 to January 3, 1939, during the first two years...
				76 76th United States Congress The Seventy-sixth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1939 to January 3, 1941, during the seventh and...
				77 77th United States Congress -Major events:* December 7, 1941: Attack on Pearl Harbor* December 8, 1941: Joint Session of Congress met to hear President Roosevelt deliver his "Day of Infamy" speech...	27	Re-elected in 1940 Lost re-election
				78 78th United States Congress The Seventy-eighth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1943 to January 3, 1945, during the last two years...
				79 79th United States Congress The Seventy-ninth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1945 to January 3, 1947, during the last months of...
27	Edward Martin	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	January 3, 1947 – January 3, 1959	80 80th United States Congress The Eightieth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1947 to January 3, 1949, during the third and fourth...	28	Elected in 1946
				81 81st United States Congress The Eighty-first United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives...
				82 82nd United States Congress The Eighty-second United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1951 to January 3, 1953, during the last two years...
				83 83rd United States Congress The Eighty-third United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1953 to January 3, 1955, during the first two years...	29	Re-elected in 1952 Retired
				84 84th United States Congress The Eighty-fourth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1955 to January 3, 1957, during the third and...
				85 85th United States Congress The Eighty-fifth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1957 to January 3, 1959, during the fifth and sixth...
28	Hugh Scott Hugh Scott Hugh Doggett Scott, Jr. was a politician from Pennsylvania who served in both the United States House of Representatives and the United States Senate, and who also served as Chairman of the Republican National Committee.- Early life :He was born in Fredericksburg, Virginia, on November 11, 1900...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	January 3, 1959 – January 3, 1977	86 86th United States Congress The Eighty-sixth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1959 to January 3, 1961, during the last two years...	30	Elected in 1958
				87 87th United States Congress -House of Representatives :-Senate:* President: Richard Nixon , until January 20, 1961** Lyndon Johnson , from January 20, 1961* President pro tempore: Carl Hayden -House of Representatives:...
				88 88th United States Congress The Eighty-eighth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1963 to January 3, 1965, during the last year of...
				89 89th United States Congress -House of Representatives:- Senate :* President of the Senate: Hubert Humphrey , starting January 20, 1965* President pro tempore: Carl Hayden - Majority leadership :* Majority Leader and Democratic Conference Chairman: Mike Mansfield...	31	Re-elected in 1964
				90 90th United States Congress The Ninetieth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1967 to January 3, 1969, during the last two years of...
				91 91st United States Congress The Ninety-first United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1969 to January 3, 1971, during the first two years...
				92 92nd United States Congress The Ninety-second United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives...	32	Re-elected in 1970 Retired
				93 93rd United States Congress The Ninety-third United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1973 to January 3, 1975, during the end of Richard...
				94 94th United States Congress The Ninety-fourth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1975 to January 3, 1977, during the administration...
29	John Heinz H. John Heinz III Henry John Heinz III was an American politician from Pennsylvania, a Republican member of the United States House of Representatives and the United States Senate .-Early life:...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	January 3, 1977 – April 4, 1991	95 95th United States Congress The Ninety-fifth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1977 to January 3, 1979, during the first two years...	33	Elected in 1976
				96 96th United States Congress The Ninety-sixth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1979 to January 3, 1981, during the last two years...
				97 97th United States Congress The Ninety-seventh United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1981 to January 3, 1983, during the final weeks of...
				98 98th United States Congress The Ninety-eighth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1983 to January 3, 1985, during the third and...	34	Re-elected in 1982 United States Senate elections, 1982 The United States Senate election of November 2, 1982 was an election for the United States Senate following the Republican gains in 1980. Party balance was unchanged following the election. Incumbents Howard Cannon of Nevada and Harrison Schmitt of New Mexico lost seats to the opposite party, the...
				99 99th United States Congress The Ninety-ninth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1985 to January 3, 1987, during the fifth and sixth...
				100 100th United States Congress -House of Representatives:- Senate :* President: George H.W. Bush * President pro tempore: John Stennis - Majority leadership :* Majority Leader, Democratic Conference Chairman, and Democratic Policy Committee Chairman: Robert Byrd...
				101 101st United States Congress The One Hundred First United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1989 to January 3, 1991, during the first two...	35	Re-elected in 1988 United States Senate elections, 1988 The United States Senate election, of November 8, 1988 was an election for the United States Senate in which, in spite of the Republican victory by George H. W. Bush in the presidential election, the Republicans suffered a net loss of one seat in the Senate... Died
				102 102nd United States Congress -House of Representatives:- Senate :* President:Dan Quayle * President pro tempore: Robert Byrd - Majority leadership :* Majority Leader: George Mitchell* Majority Whip: Wendell Ford- Minority leadership :...
Vacant			April 4, 1991 – May 9, 1831
30	Harris Wofford Harris Wofford Harris Llewellyn Wofford served as a Democratic U.S. Senator from Pennsylvania from 1991 to 1995 and as the fifth president of Bryn Mawr College, and is a noted advocate of national service and volunteering...	Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...	May 9, 1991 – January 3, 1995	102 102nd United States Congress -House of Representatives:- Senate :* President:Dan Quayle * President pro tempore: Robert Byrd - Majority leadership :* Majority Leader: George Mitchell* Majority Whip: Wendell Ford- Minority leadership :... (Continued)		Appointed to continue Heinz's term Elected to finish Heinz's term Lost re-election
				103 103rd United States Congress - House of Representatives :- Leadership :- Senate :* President: Dan Quayle , until January 20, 1993** Al Gore , from January 20, 1993* President pro tempore: Robert Byrd - Majority leadership :* Majority Leader: George Mitchell...
31	Rick Santorum Rick Santorum Richard John "Rick" Santorum is a lawyer and a former United States Senator from the commonwealth of Pennsylvania. Santorum was the chairman of the Senate Republican Conference -making him the third-ranking Senate Republican from 2001 until his leave in 2007. Santorum is considered both a social...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	January 3, 1995 – January 3, 2007	104 104th United States Congress The One Hundred Fourth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1995 to January 3, 1997, during the third and...	36	Elected in 1994 United States Senate election in Pennsylvania, 1994 The 1994 United States Senate election in Pennsylvania was held on November 8, 1994. Incumbent Democratic U.S. Senator Harris Wofford, who was recently appointed to the position in 1991, decided to seek re-election to a full six year term, but was defeated by Republican Rick Santorum.- Democratic...
				105 105th United States Congress The One Hundred Fifth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1997 to January 3, 1999, during the fifth and...
				106 106th United States Congress The One Hundred Sixth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1999 to January 3, 2001, during the last two...
				107 107th United States Congress The One Hundred Seventh United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from January 3, 2001 to January 3, 2003, during the final...	37	Re-elected in 2000 United States Senate election in Pennsylvania, 2000 The 2000 United States Senate election in Pennsylvania was held on November 7, 2000. Incumbent Republican U.S. Senator Rick Santorum won re-election to a second term.-Campaign:... Lost re-election
				108 108th United States Congress The One Hundred Eighth United States Congress was the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives from January 3, 2003 to January 3, 2005, during the third and fourth years of George W. Bush's...
				109 109th United States Congress The One Hundred Ninth United States Congress was the legislative branch of the United States, composed of the United States Senate and the United States House of Representatives, from January 3, 2005 to January 3, 2007, during the fifth and sixth years of George W. Bush's presidency. House members...
32	Bob Casey, Jr. Bob Casey, Jr. Robert Patrick "Bob" Casey, Jr. is the senior U.S. Senator from Pennsylvania and a member of the Democratic Party. He previously served as Pennsylvania Treasurer, and Pennsylvania Auditor General. He is the son of former Governor Bob Casey, Sr..He is the first Democrat elected to a full term in...	Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...	January 3, 2007 – Present	110 110th United States Congress The One Hundred Tenth United States Congress was the meeting of the legislative branch of the United States federal government, between January 3, 2007, and January 3, 2009, during the last two years of the second term of President George W. Bush. It was composed of the Senate and the House of...	38	Elected in 2006
				111 111th United States Congress The One Hundred Eleventh United States Congress was the meeting of the legislative branch of the United States federal government from January 3, 2009 until January 3, 2011. It began during the last two weeks of the George W. Bush administration, with the remainder spanning the first two years of...
				112 112th United States Congress The One Hundred Twelfth United States Congress is the current meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It convened in Washington, D.C. on January 3, 2011, and will end on January...
#	Senator	Party	Years	Congress	Term	Electoral history

Class 3

Class 3 U.S. Senators

Classes of United States Senators

The three classes of United States Senators are currently made up of 33 or 34 Senate seats. The purpose of the classes is to determine which Senate seats will be up for election in a given year. The three groups are staggered so that one of them is up for election every two years.A senator's...

 belong to the electoral cycle that were elected for three sessions of the U.S. Congress in the first election of 1788 and whose seats in recent years are contested in 1998

United States Senate election in Pennsylvania, 1998

The 1998 United States Senate election in Pennsylvania was held on November 3, 1998. Incumbent Republican U.S. Senator Arlen Specter won re-election to a fourth term.-Campaign:...

, 2004

United States Senate election in Pennsylvania, 2004

The 2004 United States Senate election in Pennsylvania was held on November 2, 2004. Incumbent Republican U.S. Senator Arlen Specter won re-election to a fifth term.-Campaign:...

, and 2010

United States Senate election in Pennsylvania, 2010

The 2010 United States Senate election in Pennsylvania took place on November 2, 2010, during the 2010 midterm elections. Incumbent Republican-turned-Democrat U.S. Senator Arlen Specter ran for re-election to a sixth term, but lost in the Democratic primary to Joe Sestak. Republican nominee Pat...

.

#	Senator	Party	Years	Congress	Term	Electoral history
1	Robert Morris Robert Morris (merchant) Robert Morris, Jr. was a British-born American merchant, and signer of the Declaration of Independence, the Articles of Confederation, and the United States Constitution...	Pro- Administration Pro-Administration Party (United States) Pro-Administration "Party" is a term by historians to describe the supporters of the policies of George Washington's administration — especially Treasury Secretary Alexander Hamilton's financial policies — prior to the formation of the Federalist and Democratic-Republican Parties.Almost the entire...	March 4, 1789 – March 3, 1795	1 1st United States Congress -House of Representatives:During this congress, five House seats were added for North Carolina and one House seat was added for Rhode Island when they ratified the Constitution.-Senate:* President: John Adams * President pro tempore: John Langdon...	1	Elected in 1789
				2 2nd United States Congress -House of Representatives:During this congress, two new House seats were added for each of the new states of Vermont and Kentucky. -Leadership:-Senate:*President: John Adams *President pro tempore:** Richard Henry Lee...
				3 3rd United States Congress The Third United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives...
2	William Bingham William Bingham William Bingham was an American statesman from Philadelphia, Pennsylvania. He was a delegate for Pennsylvania to the Continental Congress from 1786 to 1788 and served in the United States Senate from 1795 to 1801...	Federalist Federalist Party (United States) The Federalist Party was the first American political party, from the early 1790s to 1816, the era of the First Party System, with remnants lasting into the 1820s. The Federalists controlled the federal government until 1801...	March 4, 1795 – March 3, 1801	4 4th United States Congress -House of Representatives:- Senate :* President: John Adams * President pro tempore:** Henry Tazewell , first elected December 7, 1795** Samuel Livermore , first elected May 6, 1796** William Bingham , first elected February 16, 1797...	2	Elected in 1795
				5 5th United States Congress The Fifth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives...
				6 6th United States Congress The Sixth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met at Congress Hall in Philadelphia, Pennsylvania and in Washington, D.C. from March 4, 1799...
3	J. Peter G. Muhlenberg Peter Muhlenberg John Peter Gabriel Muhlenberg was an American clergyman, Continental Army soldier during the American Revolutionary War, and political figure in the newly-independent United States...	Democratic- Republican Democratic-Republican Party (United States) The Democratic-Republican Party or Republican Party was an American political party founded in the early 1790s by Thomas Jefferson and James Madison. Political scientists use the former name, while historians prefer the latter one; contemporaries generally called the party the "Republicans", along...	March 4, 1801 – June 30, 1801	7 7th United States Congress - House of Representatives :-Senate:* President: Aaron Burr * President pro tempore:** Abraham Baldwin , first elected December 7, 1801** Stephen R. Bradley , first elected December 14, 1802-House of Representatives:...	3	Elected in 1801
Vacant			June 30, 1801 – July 13, 1801
4	George Logan George Logan George Logan was an American physician, farmer, legislator and politician from Philadelphia County, Pennsylvania. He served in the Pennsylvania state legislature and represented Pennsylvania in the United States Senate. He was a founder of the Democratic-Republican Societies in 1793...	Democratic- Republican Democratic-Republican Party (United States) The Democratic-Republican Party or Republican Party was an American political party founded in the early 1790s by Thomas Jefferson and James Madison. Political scientists use the former name, while historians prefer the latter one; contemporaries generally called the party the "Republicans", along...	July 13, 1801 – March 3, 1807	7 7th United States Congress - House of Representatives :-Senate:* President: Aaron Burr * President pro tempore:** Abraham Baldwin , first elected December 7, 1801** Stephen R. Bradley , first elected December 14, 1802-House of Representatives:... (Continued)
				8 8th United States Congress - Senate :* President: Aaron Burr * President pro tempore: John Brown , October 17, 1803 – February 26, 1804** Jesse Franklin , March 10, 1804 – November 4, 1804** Joseph Anderson , January 15, 1805 – December 1, 1805- House of Representatives :...
				9 9th United States Congress - Senate :* President: George Clinton * President pro tempore: Samuel Smith - House of Representatives :* Speaker: Nathaniel Macon -Members:This list is arranged by chamber, then by state...
5	Andrew Gregg	Democratic- Republican Democratic-Republican Party (United States) The Democratic-Republican Party or Republican Party was an American political party founded in the early 1790s by Thomas Jefferson and James Madison. Political scientists use the former name, while historians prefer the latter one; contemporaries generally called the party the "Republicans", along...	March 4, 1807 – March 3, 1813	10 10th United States Congress - House of Representatives :- Senate :*President: George Clinton *President pro tempore: Samuel Smith , elected April 16, 1808** Stephen R. Bradley , elected December 28, 1808** John Milledge , elected January 30, 1809...	4	Elected in 1807
				11 11th United States Congress - House of Representatives :-Leadership:- Senate :* President: George Clinton * President pro tempore:** John Milledge ** Andrew Gregg , elected June 26, 1809** John Gaillard , elected February 28, 1810...
				12 12th United States Congress - House of Representatives :During this congress, one new House seat was added for the new state of Louisiana.- Senate :*President: George Clinton *President pro tempore: William H. Crawford -House of Representatives:*Speaker: Henry Clay...
6	Abner Lacock Abner Lacock Abner Lacock was an American surveyor, civil engineer, and politician from Rochester, Pennsylvania. He served in both houses in the state legislature and represented Pennsylvania in both the U.S. House and Senate....	Democratic- Republican Democratic-Republican Party (United States) The Democratic-Republican Party or Republican Party was an American political party founded in the early 1790s by Thomas Jefferson and James Madison. Political scientists use the former name, while historians prefer the latter one; contemporaries generally called the party the "Republicans", along...	March 4, 1813 – March 3, 1819	13 13th United States Congress - Senate :* President: Elbridge Gerry , until November 23, 1814, thereafter vacant.* President pro tempore: Joseph B. Varnum , December 6, 1813 – February 3, 1814** John Gaillard , elected November 25, 1814- House of Representatives :...	5	Elected in 1813
				14 14th United States Congress - Senate :* President: Vacant* President pro tempore: John Gaillard of South Carolina, first elected December 4, 1815- House of Representatives :* Speaker: Henry Clay of Kentucky-Members:This list is arranged by chamber, then by state...
				15 15th United States Congress -Leadership:- Senate :* President: Daniel D. Tompkins * President pro tempore:** John Gaillard , elected March 4, 1817** James Barbour , elected February 15, 1819- House of Representatives :*Speaker: Henry Clay -Members:...
7	Walter Lowrie Walter Lowrie Walter Lowrie was a teacher, farmer, and politician from Butler County, Pennsylvania. He served in both houses in the state legislature and represented Pennsylvania in the United States Senate...	Democratic- Republican Democratic-Republican Party (United States) The Democratic-Republican Party or Republican Party was an American political party founded in the early 1790s by Thomas Jefferson and James Madison. Political scientists use the former name, while historians prefer the latter one; contemporaries generally called the party the "Republicans", along...	March 4, 1819 – March 3, 1825	16 16th United States Congress -House of Representatives:During this congress, one House seat was added for the new state of Alabama and one seat was reapportioned from Massachusetts to the new state of Maine. For the beginning of the next congress, six more seats from Massachusetts would be reapportioned to...	6	Elected in 1819
				17 17th United States Congress The Seventeenth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1821 to March 3, 1823, during the fifth and sixth...
		Crawford Republican Democratic-Republican Party (United States) The Democratic-Republican Party or Republican Party was an American political party founded in the early 1790s by Thomas Jefferson and James Madison. Political scientists use the former name, while historians prefer the latter one; contemporaries generally called the party the "Republicans", along...		18 18th United States Congress The Eighteenth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1823 to March 3, 1825, during the seventh and eighth...
8	William Marks William Marks (Pennsylvania) William Marks was an American lawyer and politician from Beaver, Pennsylvania. He served in both houses in the state legislature and was the Speaker for the House from 1813 to 1819. He later represented Pennsylvania in the United States Senate.-External links:*...	Anti-Jacksonian	March 4, 1825 – March 3, 1831	19 19th United States Congress -House of Representatives:-Leadership:- Senate :* President: John C. Calhoun * President pro tempore: John Gaillard , until December 4, 1825** Nathaniel Macon , from May 20, 1826- House of Representatives :* Speaker: John W. Taylor -Members:...	7	Elected in 1825
		Adams		20 20th United States Congress -House of Representatives:-Leadership:- Senate :* President: John C. Calhoun * President pro tempore: Samuel Smith - House of Representatives :* Speaker: Andrew Stevenson -Members:This list is arranged by chamber, then by state...
		Anti-Jacksonian		21 21st United States Congress -House of Representatives:-Leadership:- Senate :* President: John C. Calhoun * President pro tempore: Samuel Smith - House of Representatives :* Speaker: Andrew Stevenson -Members:This list is arranged by chamber, then by state...
9	William Wilkins William Wilkins (U.S. politician) William Wilkins was an American lawyer, jurist, and politician from Pittsburgh, Pennsylvania. During his career, he served in both houses of the Pennsylvania State Legislature, and in all three branches of the United States federal government, including service as a United States federal judge, as...	Jacksonian	March 4, 1831 – June 30, 1834	22 22nd United States Congress -House of Representatives:-Leadership:- Senate :* President:** John C. Calhoun , resigned December 28, 1832, thereafter vacant.* President pro tempore:** Samuel Smith , first elected December 5, 1831** Littleton W...	8	Elected in 1831
				23 23rd United States Congress -House of Representatives:For the beginning of this congress, the size of the House was increased from 213 seats to 240 seats, following the 1830 United States Census .- Leadership :- Senate :* President: Martin Van Buren...
Vacant			June 30, 1834 – December 6, 1834
10	James Buchanan James Buchanan James Buchanan, Jr. was the 15th President of the United States . He is the only president from Pennsylvania, the only president who remained a lifelong bachelor and the last to be born in the 18th century....	Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...	December 6, 1834 – March 5, 1845	23 23rd United States Congress -House of Representatives:For the beginning of this congress, the size of the House was increased from 213 seats to 240 seats, following the 1830 United States Census .- Leadership :- Senate :* President: Martin Van Buren... (Continued)
				24 24th United States Congress -House of Representatives:During this congress one House seat was added for each of the new states of Arkansas and Michigan.-Leadership:- Senate :* President: Martin Van Buren * President pro tempore: William R. King - House of Representatives :...
				25 25th United States Congress -House of Representatives:-Leadership:- Senate :* President: Richard Mentor Johnson * President pro tempore: William R. King - House of Representatives :* Speaker: James K. Polk -Members:This list is arranged by chamber, then by state...	9	Re-elected in 1837
				26 26th United States Congress -House of Representatives:- Leadership :- Senate :*President: Richard M. Johnson *President pro tempore: William R. King - House of Representatives :*Speaker: Robert M.T. Hunter -Members:This list is arranged by chamber, then by state...
				27 27th United States Congress The Twenty-seventh United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1841 to March 3, 1843, during the one-month...
				28 28th United States Congress -House of Representatives:Following the 1840 United States Census, Congress reapportioned the House to include 223 seats . During this congress, one House seat was added for the new state of Florida .- Senate :*President: Vacant...	10	Re-elected in 1843
				29 29th United States Congress -House of Representatives:During this congress, two House seats were added for each of the new states of Texas and Iowa.-Leadership:-Senate:* President: George M. Dallas * President pro tempore: Willie P. Mangum...
Vacant			March 5, 1845 – March 13, 1845
11	Simon Cameron Simon Cameron Simon Cameron was an American politician who served as United States Secretary of War for Abraham Lincoln at the start of the American Civil War. After making his fortune in railways and banking, he turned to a life of politics. He became a U.S. senator in 1845 for the state of Pennsylvania,...	Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...	March 13, 1845 – March 3, 1849	29 29th United States Congress -House of Representatives:During this congress, two House seats were added for each of the new states of Texas and Iowa.-Leadership:-Senate:* President: George M. Dallas * President pro tempore: Willie P. Mangum... (Continued)
				30 30th United States Congress The Thirtieth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1847 to March 3, 1849, during the last two years of...
12	James Cooper James Cooper (Pennsylvania) James Cooper was an American lawyer, soldier, and politician, who served in the United States Congress.Cooper lived much of his life in Gettysburg, Pennsylvania. He served in the Pennsylvania House of Representatives and was its Speaker for a year. He represented Pennsylvania in both the United...	Whig Whig Party (United States) The Whig Party was a political party of the United States during the era of Jacksonian democracy. Considered integral to the Second Party System and operating from the early 1830s to the mid-1850s, the party was formed in opposition to the policies of President Andrew Jackson and his Democratic...	March 4, 1849 – March 3, 1855	31 31st United States Congress The Thirty-first United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1849 to March 3, 1851, during the last 17 months...	11	Elected in 1849
				32 32nd United States Congress The Thirty-second United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1851 to March 3, 1853, during the third and...
				33 33rd United States Congress The Thirty-third United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1853 to March 3, 1855, during the first two years...
Vacant			March 4, 1855 – January 14, 1856	34 34th United States Congress The Thirty-fourth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1855 to March 4, 1857, during the last two years...	12
13	William Bigler William Bigler William Bigler was the 12th Governor of Pennsylvania from 1852 to 1855, and later a U.S. Senator for the Democratic Party....	Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...	January 14, 1856 – March 3, 1861	34 34th United States Congress The Thirty-fourth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1855 to March 4, 1857, during the last two years... (Continued)		Elected late in 1856
				35 35th United States Congress The 35th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1857 to March 3, 1859, during the first two years of James...
				36 36th United States Congress The Thirty-sixth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1859 to March 4, 1861, during the third and fourth...
14	Edgar Cowan Edgar Cowan Edgar Cowan was an American lawyer and Republican politician from Greensburg, Pennsylvania. He represented Pennsylvania in the United States Senate during the American Civil War....	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	March 4, 1861 – March 3, 1867	37 37th United States Congress The Thirty-seventh United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1861 to March 4, 1863, during the first two...	13	Elected in 1860 United States Senate elections, 1860 The United States Senate election of 1860 was an election corresponding with Abraham Lincoln's election to the presidency, with the Republican Party gaining control of the United States Senate. As many Southern States seceded following the election, and members left the Senate to join the...
				38 38th United States Congress -House of Representatives:Before this Congress, the 1860 United States Census and resulting reapportionment changed the size of the House to 241 members...
				39 39th United States Congress The Thirty-ninth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1865 to March 4, 1867, during the first month of...
15	Simon Cameron Simon Cameron Simon Cameron was an American politician who served as United States Secretary of War for Abraham Lincoln at the start of the American Civil War. After making his fortune in railways and banking, he turned to a life of politics. He became a U.S. senator in 1845 for the state of Pennsylvania,...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	March 4, 1867 – March 12, 1877	40 40th United States Congress The Fortieth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1867 to March 4, 1869, during the third and fourth...	14	Elected in 1866 United States Senate elections, 1866 The United States Senate election of 1866 was an election which had the Republican Party gain eighteen seats in the United States Senate as several of the Southern States were readmitted during Reconstruction, enlarging their already overwhelming majority....
				41 41st United States Congress -House of Representatives:- Senate :* President : Schuyler Colfax* President pro tempore: Henry B. Anthony - House of Representatives :* Speaker: James G. Blaine -Members:This list is arranged by chamber, then by state...
				42 42nd United States Congress The Forty-second United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1871 to March 3, 1873, during the third and fourth...
				43 43rd United States Congress The Forty-third United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1873 to March 4, 1875, during the fifth and sixth...	15	Re-elected in 1872 United States Senate elections, 1872 The United States Senate election of 1872 was an election which had the Republican Party, while still retaining a commanding majority, lose nine seats in the United States Senate, mostly as defections to the Liberal Republican Party. It also coincided with President Ulysses S...
				44 44th United States Congress The Forty-fourth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1875 to March 4, 1877, during the seventh and...
				45 45th United States Congress -House of Representatives:-Leadership:-Senate:*President: William A. Wheeler *President pro tempore: Thomas W. Ferry -House of Representatives:*Speaker: Samuel J. Randall -Members:This list is arranged by chamber, then by state...
Vacant			March 12, 1877 – March 20, 1877
16	J. Donald Cameron	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	March 20, 1877 – March 3, 1897	45 45th United States Congress -House of Representatives:-Leadership:-Senate:*President: William A. Wheeler *President pro tempore: Thomas W. Ferry -House of Representatives:*Speaker: Samuel J. Randall -Members:This list is arranged by chamber, then by state... (Continued)
				46 46th United States Congress The Forty-sixth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1879 to March 4, 1881, during the last two years of...	16
				47 47th United States Congress The Forty-seventh United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1881 to March 4, 1883, during the administration...
				48 48th United States Congress The Forty-eighth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1883 to March 4, 1885, during the last two years...
				49 49th United States Congress The Forty-ninth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1885 to March 4, 1887, during the first two years...	17	Re-elected in 1884 United States Senate elections, 1884 The United States Senate election of 1884 was an election which had the Republican Party gain four seats in the United States Senate, and which coincided with the presidential election of 1884....
				50 50th United States Congress The Fiftieth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1887 to March 4, 1889, during the third and fourth...
				51 51st United States Congress The Fifty-first United States Congress, referred to by some critics as the Billion Dollar Congress, was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C...
				52 52nd United States Congress The Fifty-second United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C...	18	Re-elected in 1890 United States Senate elections, 1890 The United States Senate election of 1890 was an election which had the Republican Party lose two seats in the United States Senate, though still retain a commanding majority....
				53 53rd United States Congress The Fifty-third United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1893 to March 4, 1895, during the fifth and sixth...
				54 54th United States Congress - House of Representatives :-Leadership:- Senate :* President: Adlai E. Stevenson * President pro tempore: William P. Frye - Majority leadership :* Republican Conference Chairman: John Sherman- Minority leadership :...
17	Boies Penrose Boies Penrose Boies Penrose was an American lawyer and Republican politician from Philadelphia, Pennsylvania. He represented Pennsylvania in the United States Senate from 1897 until his death in 1921.-Biography:...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	March 4, 1897 – December 31, 1921	55 55th United States Congress -House of Representatives:* Republican: 206 * Democratic: 124* Populist: 22* Silver Republican: 3* Silver: 1* Independent Republican: 1TOTAL members: 357-Leadership:-Senate:* President: Garret Hobart * President pro tempore: William P...	19	Elected in 1896 United States Senate elections, 1896 The United States Senate election of 1896 was an election which had the Democratic Party lose six seats in the United States Senate, mostly to minor third parties....
				56 56th United States Congress -House of Representatives:- Leadership :- Senate :* President: Garret Hobart , until November 21, 1899 , vacant thereafter.* President pro tempore: William P. Frye * Democratic Caucus Chairman: James K. Jones...
				57 57th United States Congress -House of Representatives:*Democratic: 151*Republican: 200 *Populist: 5*Silver : 1TOTAL members: 357-Leadership:-Senate:* President: Theodore Roosevelt , until September 14, 1901, vacant thereafter....
				58 58th United States Congress - House of Representatives :* Republican : 209 * Democratic : 176* Silver Republican : 1TOTAL members: 386-Senate:* President: Vacant* President pro tempore: William P. Frye -Members:...	20	Re-elected in 1902 United States Senate elections, 1902 The United States Senate election of 1902 was an election which had the Republican Party and the Democratic Party each gain one seat in the United States Senate....
				59 59th United States Congress The Fifty-ninth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1905 to March 4, 1907, during the fifth and sixth...
				60 60th United States Congress The Sixtieth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1907 to March 4, 1909, during the last two years of...
				61 61st United States Congress The Sixty-first United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1909 to March 4, 1911, during the first two years of...	21	Re-elected in 1908 United States Senate elections, 1908 Some states elected their Senators directly even before passage of the 17th Amendment in 1913. Oregon pioneered direct election and experimented with different measures over several years until it succeeded in 1907. Soon after, Nebraska followed suit and laid the foundation for other states to...
				62 62nd United States Congress - House of Representatives :* Democratic : 230 * Republican : 162* Socialist : 1* Independent : 1TOTAL members: 394-Senate:* President: James S...
				63 63rd United States Congress - House of Representatives:*Democratic : 291 *Republican : 134*Progressive : 9*Independent : 1TOTAL members: 435-Senate:*President of the Senate: Thomas R. Marshall*President pro tempore: James P. Clarke-Senate:...
				64 64th United States Congress The Sixty-fourth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1915 to March 4, 1917, during the third and fourth...	22	Re-elected in 1914 United States Senate election in Pennsylvania, 1914 The 1914 United States Senate election in Pennsylvania was held on November 3, 1914. Incumbent Republican U.S. Senator Boies Penrose won re-election against Gifford Pinchot and Alexander Mitchell Palmer.-Results:...
				65 65th United States Congress The Sixty-fifth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1917 to March 4, 1919, during the fourth and fifth...
				66 66th United States Congress The Sixty-sixth United States Congress was a meeting of the legislative branch of the United States federal government, comprising the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1919 to March 4, 1921, during the last two years of...
				67 67th United States Congress The Sixty-seventh United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1921 to March 4, 1923, during the first two years...	23
Vacant			December 31, 1921 – January 9, 1922
18	George Wharton Pepper	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	January 9, 1922 – March 3, 1927	67 67th United States Congress The Sixty-seventh United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1921 to March 4, 1923, during the first two years... (Continued)		Elected in 1920 United States Senate election, 1920 The United States Senate elections of 1920 were elections for the United States Senate which coincided with the election of Warren G. Harding as President. Democrat Woodrow Wilson's unpopularity allowed Republicans to win races across the country, winning ten seats from the Democrats and cementing...
				68 68th United States Congress The Sixty-eighth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1923 to March 4, 1925, during the last months of...
				69 69th United States Congress The Sixty-ninth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1925 to March 4, 1927, during the third and fourth...
19	William S. Vare William S. Vare William Scott Vare was an American construction contractor and Republican Party politician from Philadelphia, Pennsylvania. He represented Pennsylvania in the U.S House and won a contested election to the United States Senate.-Youth:Bill Vare was the youngest of three Vare brothers who were all...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	March 4, 1927 – December 6, 1929	70 70th United States Congress The Seventieth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1927 to March 3, 1929, during the last two years of...	24	Elected in 1926 Senate refused to seat due to allegations of corruption surrounding the election
				71 71st United States Congress The Seventy-first United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1929 to March 4, 1931, during the first two years...
Vacant			December 6, 1929 – December 11, 1929
20	Joseph R. Grundy Joseph R. Grundy Joseph Ridgway Grundy was an American textile manufacturer and Republican Party politician from Bristol, Pennsylvania. He represented Pennsylvania in the United States Senate.He was educated at Swarthmore College...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	December 11, 1929 – December 1, 1930			Appointed to continue Vare's term Lost nomination to finish Vare's term
21	James J. Davis James J. Davis James John Davis was an American steel worker and Republican Party politician in Pittsburgh, Pennsylvania. He served as U.S. Secretary of Labor and represented Pennsylvania in the United States Senate...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	December 2, 1930 – January 3, 1945	71 71st United States Congress The Seventy-first United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1929 to March 4, 1931, during the first two years... (Continued)		Elected to finish Vare's term
				72 72nd United States Congress The Seventy-second United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1931 to March 4, 1933, during the last two years...
				73 73rd United States Congress The Seventy-third United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from March 4, 1933 to January 3, 1935, during the first two years...	25	Re-elected in 1932
				74 74th United States Congress -House:Also 2 Delegates, 3 Resident Commissioners-Senate:*President of the Senate: John N. Garner *President pro tempore: Key Pittman -Majority leadership:*Majority leader: Joseph T. Robinson...
				75 75th United States Congress The Seventy-fifth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1937 to January 3, 1939, during the first two years...
				76 76th United States Congress The Seventy-sixth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1939 to January 3, 1941, during the seventh and...	26	Re-elected in 1938
				77 77th United States Congress -Major events:* December 7, 1941: Attack on Pearl Harbor* December 8, 1941: Joint Session of Congress met to hear President Roosevelt deliver his "Day of Infamy" speech...
				78 78th United States Congress The Seventy-eighth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1943 to January 3, 1945, during the last two years...
22	Francis J. Myers Francis J. Myers Francis John Myers was an American teacher, lawyer, and Democratic Party politician from Philadelphia, Pennsylvania. A graduate of the St. Joseph's University and Temple University School of Law, He represented Pennsylvania in the U.S. House of Representatives, and then in the United States Senate...	Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...	January 3, 1945 – January 3, 1951	79 79th United States Congress The Seventy-ninth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1945 to January 3, 1947, during the last months of...	27	Elected in 1944
				80 80th United States Congress The Eightieth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1947 to January 3, 1949, during the third and fourth...
				81 81st United States Congress The Eighty-first United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives...
23	James H. Duff James H. Duff James Henderson Duff was an American lawyer and politician in the mid-20th century. He served as the 34th Governor of Pennsylvania and U.S...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	January 3, 1951 – January 3, 1957	82 82nd United States Congress The Eighty-second United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1951 to January 3, 1953, during the last two years...	28	Elected in 1950
				83 83rd United States Congress The Eighty-third United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1953 to January 3, 1955, during the first two years...
				84 84th United States Congress The Eighty-fourth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1955 to January 3, 1957, during the third and...
24	Joseph S. Clark Joseph S. Clark Joseph Sill Clark, Jr. was a U.S. lawyer and Democratic Party politician in the mid-20th century. He served as the mayor of Philadelphia from 1952 until 1956, and as a United States Senator from Pennsylvania from 1957 until 1969...	Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...	January 3, 1957 – January 3, 1969	85 85th United States Congress The Eighty-fifth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1957 to January 3, 1959, during the fifth and sixth...	29	Elected in 1956
				86 86th United States Congress The Eighty-sixth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1959 to January 3, 1961, during the last two years...
				87 87th United States Congress -House of Representatives :-Senate:* President: Richard Nixon , until January 20, 1961** Lyndon Johnson , from January 20, 1961* President pro tempore: Carl Hayden -House of Representatives:...
				88 88th United States Congress The Eighty-eighth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1963 to January 3, 1965, during the last year of...	30	Re-elected in 1962 Lost re-election
				89 89th United States Congress -House of Representatives:- Senate :* President of the Senate: Hubert Humphrey , starting January 20, 1965* President pro tempore: Carl Hayden - Majority leadership :* Majority Leader and Democratic Conference Chairman: Mike Mansfield...
				90 90th United States Congress The Ninetieth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1967 to January 3, 1969, during the last two years of...
25	Richard S. Schweiker	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	January 3, 1969 – January 3, 1981	91 91st United States Congress The Ninety-first United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1969 to January 3, 1971, during the first two years...	31	Elected in 1968
				92 92nd United States Congress The Ninety-second United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives...
				93 93rd United States Congress The Ninety-third United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1973 to January 3, 1975, during the end of Richard...
				94 94th United States Congress The Ninety-fourth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1975 to January 3, 1977, during the administration...	32	Re-elected in 1974 Did not run for re-election
				95 95th United States Congress The Ninety-fifth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1977 to January 3, 1979, during the first two years...
				96 96th United States Congress The Ninety-sixth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1979 to January 3, 1981, during the last two years...
26	Arlen Specter Arlen Specter Arlen Specter is a former United States Senator from Pennsylvania. Specter is a Democrat, but was a Republican from 1965 until switching to the Democratic Party in 2009...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	January 3, 1981 – January 3, 2011	97 97th United States Congress The Ninety-seventh United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1981 to January 3, 1983, during the final weeks of...	33	Elected in 1980 United States Senate election in Pennsylvania, 1980 The 1980 United States Senate election in Pennsylvania was held on November 4, 1980. Incumbent Republican U.S. Senator Richard Schweiker decided to retire, instead of seeking a third term. Republican Arlen Specter won the open seat.-Results:...
				98 98th United States Congress The Ninety-eighth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1983 to January 3, 1985, during the third and...
				99 99th United States Congress The Ninety-ninth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1985 to January 3, 1987, during the fifth and sixth...
				100 100th United States Congress -House of Representatives:- Senate :* President: George H.W. Bush * President pro tempore: John Stennis - Majority leadership :* Majority Leader, Democratic Conference Chairman, and Democratic Policy Committee Chairman: Robert Byrd...	34	Re-elected in 1986 United States Senate election in Pennsylvania, 1986 The 1986 United States Senate election in Pennsylvania was held on November 4, 1986. Incumbent Republican U.S. Senator Arlen Specter won re-election to a second term.-Campaign:...
				101 101st United States Congress The One Hundred First United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1989 to January 3, 1991, during the first two...
				102 102nd United States Congress -House of Representatives:- Senate :* President:Dan Quayle * President pro tempore: Robert Byrd - Majority leadership :* Majority Leader: George Mitchell* Majority Whip: Wendell Ford- Minority leadership :...
				103 103rd United States Congress - House of Representatives :- Leadership :- Senate :* President: Dan Quayle , until January 20, 1993** Al Gore , from January 20, 1993* President pro tempore: Robert Byrd - Majority leadership :* Majority Leader: George Mitchell...	35	Re-elected in 1992 United States Senate election in Pennsylvania, 1992 The 1992 United States Senate election in Pennsylvania was held on November 3, 1992. Incumbent Republican U.S. Senator Arlen Specter won re-election to a third term.-Democratic:...
				104 104th United States Congress The One Hundred Fourth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1995 to January 3, 1997, during the third and...
				105 105th United States Congress The One Hundred Fifth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1997 to January 3, 1999, during the fifth and...
				106 106th United States Congress The One Hundred Sixth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1999 to January 3, 2001, during the last two...	36	Re-elected in 1998 United States Senate election in Pennsylvania, 1998 The 1998 United States Senate election in Pennsylvania was held on November 3, 1998. Incumbent Republican U.S. Senator Arlen Specter won re-election to a fourth term.-Campaign:...
				107 107th United States Congress The One Hundred Seventh United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from January 3, 2001 to January 3, 2003, during the final...
				108 108th United States Congress The One Hundred Eighth United States Congress was the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives from January 3, 2003 to January 3, 2005, during the third and fourth years of George W. Bush's...
				109 109th United States Congress The One Hundred Ninth United States Congress was the legislative branch of the United States, composed of the United States Senate and the United States House of Representatives, from January 3, 2005 to January 3, 2007, during the fifth and sixth years of George W. Bush's presidency. House members...	37	Re-elected in 2004 United States Senate election in Pennsylvania, 2004 The 2004 United States Senate election in Pennsylvania was held on November 2, 2004. Incumbent Republican U.S. Senator Arlen Specter won re-election to a fifth term.-Campaign:... Lost renomination
				110 110th United States Congress The One Hundred Tenth United States Congress was the meeting of the legislative branch of the United States federal government, between January 3, 2007, and January 3, 2009, during the last two years of the second term of President George W. Bush. It was composed of the Senate and the House of...
		Democratic Democratic Party (United States) The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...		111 111th United States Congress The One Hundred Eleventh United States Congress was the meeting of the legislative branch of the United States federal government from January 3, 2009 until January 3, 2011. It began during the last two weeks of the George W. Bush administration, with the remainder spanning the first two years of...
27	Pat Toomey Pat Toomey Patrick Joseph "Pat" Toomey, Sr. is the junior United States Senator for Pennsylvania and a member of the Republican Party. Previously, Toomey served as a U.S. Representative for three terms, but did not seek a fourth in compliance with a pledge he had made while running for office in 1998...	Republican Republican Party (United States) The Republican Party is one of the two major contemporary political parties in the United States, along with the Democratic Party. Founded by anti-slavery expansion activists in 1854, it is often called the GOP . The party's platform generally reflects American conservatism in the U.S...	January 3, 2011 – Present	112 112th United States Congress The One Hundred Twelfth United States Congress is the current meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It convened in Washington, D.C. on January 3, 2011, and will end on January...	38	Elected in 2010 United States Senate election in Pennsylvania, 2010 The 2010 United States Senate election in Pennsylvania took place on November 2, 2010, during the 2010 midterm elections. Incumbent Republican-turned-Democrat U.S. Senator Arlen Specter ran for re-election to a sixth term, but lost in the Democratic primary to Joe Sestak. Republican nominee Pat...
				113 113th United States Congress The One Hundred Thirteenth United States Congress will be the next meeting of the legislative branch of the United States federal government after the 112th Congress is seated. It will be composed of the United States Senate and the United States House of Representatives. It is scheduled to meet...
				114
#	Senator	Party	Years	Congress	Term	Electoral history

See also

• United States congressional delegations from Pennsylvania
  United States Congressional Delegations from Pennsylvania
  These are tables of congressional delegations from Pennsylvania to the United States Senate and United States House of Representatives.-United States Senate:-United States House of Representatives:-1789–1793: 8 Seats:...
  
  
• List of United States Representatives from Pennsylvania