United States Post Office Department
Overview
 
The Post Office Department (1792–1971) was the name of the United States Postal Service
United States Postal Service
The United States Postal Service is an independent agency of the United States government responsible for providing postal service in the United States...

 when it was a Cabinet
United States Cabinet
The Cabinet of the United States is composed of the most senior appointed officers of the executive branch of the federal government of the United States, which are generally the heads of the federal executive departments...

 department. It was headed by the Postmaster General
United States Postmaster General
The United States Postmaster General is the Chief Executive Officer of the United States Postal Service. The office, in one form or another, is older than both the United States Constitution and the United States Declaration of Independence...

.

The Postal Service Act
Postal Service Act
The Postal Service Act was a piece of United States federal legislation that established the United States Post Office Department. It was signed into law by President George Washington on February 20, 1792.- History :...

 signed by President
President of the United States
The President of the United States of America is the head of state and head of government of the United States. The president leads the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces....

 George Washington
George Washington
George Washington was the dominant military and political leader of the new United States of America from 1775 to 1799. He led the American victory over Great Britain in the American Revolutionary War as commander-in-chief of the Continental Army from 1775 to 1783, and presided over the writing of...

 on February 20, 1792, established the Department. Postmaster General John McLean
John McLean
John McLean was an American jurist and politician who served in the United States Congress, as U.S. Postmaster General, and as a justice on the Ohio and U.S...

 was the first to call it the Post Office Department rather than just the "Post Office." The organization received a boost in prestige when President Andrew Jackson
Andrew Jackson
Andrew Jackson was the seventh President of the United States . Based in frontier Tennessee, Jackson was a politician and army general who defeated the Creek Indians at the Battle of Horseshoe Bend , and the British at the Battle of New Orleans...

 invited his Postmaster General, William T. Barry
William T. Barry
William Taylor Barry was an American statesman and jurist.-History:Born near Lunenburg, Virginia, he moved to Fayette County, Kentucky, in 1796 with his parents John Barry, an American Revolutionary War veteran, and Susannah Barry...

, to sit as a member of the Cabinet in 1829.
 
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