List of counties in Maryland
Encyclopedia
There are twenty-four counties and county-equivalent
County-equivalent
A county-equivalent in the United States is a term used by the federal government to describe one of the two following governmental subdivisions:#A unit of local government in certain states which is comparable to a county as found in most states....

s in the U.S. state
U.S. state
A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Maryland
Maryland
Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...

. Though an independent city rather than a county, the City of Baltimore is considered the equal of a county for most purposes and is a county-equivalent. Many of the counties in Maryland were named for relatives of the Barons Baltimore
Baron Baltimore
Baron Baltimore, of Baltimore Manor in County Longford, was a title in the Peerage of Ireland. It was created in 1625 for George Calvert and became extinct on the death of the sixth Baron in 1771. The title was held by several members of the Calvert family who were proprietors of the palatinates...

 who were the proprietors of the Maryland colony from its founding in 1634 through 1771. The Barons Baltimore were Catholic
Catholicism
Catholicism is a broad term for the body of the Catholic faith, its theologies and doctrines, its liturgical, ethical, spiritual, and behavioral characteristics, as well as a religious people as a whole....

, and George Calvert, 1st Baron Baltimore
George Calvert, 1st Baron Baltimore
Sir George Calvert, 1st Baron Baltimore, 8th Proprietary Governor of Newfoundland was an English politician and colonizer. He achieved domestic political success as a Member of Parliament and later Secretary of State under King James I...

, originally intended that the colony be a haven for English Catholics, though for most of its history Maryland has had a majority of Protestants
Protestantism
Protestantism is one of the three major groupings within Christianity. It is a movement that began in Germany in the early 16th century as a reaction against medieval Roman Catholic doctrines and practices, especially in regards to salvation, justification, and ecclesiology.The doctrines of the...

.

The last new county formation in Maryland occurred when Garrett County
Garrett County, Maryland
Garrett County is the westernmost county of the U.S. state of Maryland. Created from Allegany County, Maryland in 1872 it was the last Maryland county to be formed. It was named for John Work Garrett , railroad executive, industrialist, and financier. Garrett served as president of the Baltimore...

 was formed in 1872 from portions of Allegany County
Allegany County, Maryland
Allegany County is a county located in the northwestern part of the US state of Maryland. It is part of the Cumberland, MD-WV Metropolitan Statistical Area. As of 2010, the population was 75,087. Its county seat is Cumberland...

. However, there have been numerous border changes since that time, most recently when portions of the city of Takoma Park
Takoma Park, Maryland
Takoma Park is a city in Montgomery County, Maryland, United States. It is a suburb of Washington, D.C., and part of the Washington Metropolitan Area. Founded in 1883 and incorporated in 1890, Takoma Park, informally called "Azalea City," is a Tree City USA and a nuclear-free zone...

 that had previously been part of Prince George's County
Prince George's County, Maryland
Prince George's County is a county located in the U.S. state of Maryland, immediately north, east, and south of Washington, DC. As of 2010, it has a population of 863,420 and is the wealthiest African-American majority county in the nation....

 were absorbed into Montgomery County
Montgomery County, Maryland
Montgomery County is a county in the U.S. state of Maryland, situated just to the north of Washington, D.C., and southwest of the city of Baltimore. It is one of the most affluent counties in the United States, and has the highest percentage of residents over 25 years of age who hold post-graduate...

 in 1997.

Outside of Baltimore (which is an independent city
Independent city
An independent city is a city that does not form part of another general-purpose local government entity. These type of cities should not be confused with city-states , which are fully sovereign cities that are not part of any other sovereign state.-Historical precursors:In the Holy Roman Empire,...

) the county is the default unit of local government. Under Maryland law, counties exercise powers reserved in most other states at the municipal or state levels, so there is little incentive for a community to incorporate. Many of the state's most populous and economically important communities, such as Bethesda
Bethesda, Maryland
Bethesda is a census designated place in southern Montgomery County, Maryland, United States, just northwest of Washington, D.C. It takes its name from a local church, the Bethesda Meeting House , which in turn took its name from Jerusalem's Pool of Bethesda...

, Silver Spring
Silver Spring, Maryland
Silver Spring is an unincorporated area and census-designated place in Montgomery County, Maryland, United States. It had a population of 71,452 at the 2010 census, making it the fourth most populous place in Maryland, after Baltimore, Columbia, and Germantown.The urbanized, oldest, and...

, Columbia
Columbia, Maryland
Columbia is a planned community that consists of ten self-contained villages, located in Howard County, Maryland, United States. It began with the idea that a city could enhance its residents' quality of life. Creator and developer James W. Rouse saw the new community in terms of human values, not...

 and Towson
Towson, Maryland
Towson is an unincorporated community and a census-designated place in Baltimore County, Maryland, United States. The population was 55,197 at the 2010 census...

 are unincorporated
Unincorporated area
In law, an unincorporated area is a region of land that is not a part of any municipality.To "incorporate" in this context means to form a municipal corporation, a city, town, or village with its own government. An unincorporated community is usually not subject to or taxed by a municipal government...

 and receive their municipal services from the county. In fact, there are no incorporated municipalities at all in Howard County. The county-equivalent is also the provider of public schools - School district
School district
School districts are a form of special-purpose district which serves to operate the local public primary and secondary schools.-United States:...

s as a separate level of government do not exist in Maryland.

The City of Baltimore generally possesses the same powers and responsibilities as the counties within the state. It is an entity nearly surrounded by but separate from the County of Baltimore
Baltimore County, Maryland
Baltimore County is a county located in the northern part of the US state of Maryland. In 2010, its population was 805,029. It is part of the Baltimore-Washington Metropolitan Area. Its county seat is Towson. The name of the county was derived from the barony of the Proprietor of the Maryland...

, which has its county seat in Towson
Towson, Maryland
Towson is an unincorporated community and a census-designated place in Baltimore County, Maryland, United States. The population was 55,197 at the 2010 census...

.

The Federal Information Processing Standard
Federal Information Processing Standard
A Federal Information Processing Standard is a publicly announced standardization developed by the United States federal government for use in computer systems by all non-military government agencies and by government contractors, when properly invoked and tailored on a contract...

 (FIPS) code, which is used by the United States government to uniquely identify states and counties, is provided with each entry. Maryland's code is 24, which when combined with any county code would be written as 24XXX. The FIPS code for each county links to census data for that county.

Alphabetical listing

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Defunct counties

County Years of existence Etymology
Old Charles County 1650–1654 Charles I, King of England
Durham County 1669–1672 The English County Durham
County Durham
County Durham is a ceremonial county and unitary district in north east England. The county town is Durham. The largest settlement in the ceremonial county is the town of Darlington...

Old Worcester County 1672–1685 Mary Arundell, the wife of Sir John Somerset, son of the 1st Marquess of Worcester
Henry Somerset, 1st Marquess of Worcester
Henry Somerset, 1st Marquess of Worcester was an English aristocrat, inheriting the title Earl of Worcester from his father Edward Somerset, 4th Earl of Worcester, in 1628. He was a prominent and financially important royalist....

,
and sister of Anne Arundell, wife of Cæcilius Calvert, 2nd Baron Baltimore
Cæcilius Calvert, 2nd Baron Baltimore
Cecilius Calvert, 2nd Baron Baltimore, 1st Proprietor and 1st Proprietary Governor of Maryland, 9th Proprietary Governor of Newfoundland , was an English peer who was the first proprietor of the Province of Maryland. He received the proprietorship after the death of his father, George Calvert, the...

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