List of counties in Maryland

History

The last new county formation in Maryland occurred when Montgomery County in 1997.^[3]

Outside of Baltimore (which is an independent city) 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, Silver Spring, Columbia, and Towson are unincorporated and receive their municipal services from the county. In fact, there are no incorporated municipalities at all in Baltimore County or Howard County, and the state's largest county, Montgomery County, only has three incorporated municipalities. The county-equivalent is also the provider of public schools—school districts 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, which has its county seat in Towson.

The Federal Information Processing Standard (FIPS) code, which is used by the United States government to uniquely identify states and counties, is provided with each entry.^[4] 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

County	INCITS [5]	County seat [2][6]	Established [2][6]	Origin [2]	Etymology [2]	Population [7]	Area [6][8]	Map
Allegany County	001	Cumberland	1789	Formed from part of Washington County.	From the Lenape Indian word oolikhanna, which means "beautiful stream"	7004740120000000000♠74,012	7002430000000000000♠430 sq mi (7003111400000000000♠1,114 km2)
Anne Arundel County	003	Annapolis	1650	Formed from part of St. Mary's County.	Anne Arundell was the maiden name of the wife of Cecil Calvert, 2nd Baron Baltimore. Between 1654 and 1658 it was known as Providence County by Puritan settlers	7005550488000000000♠550,488	7002588000000000000♠588 sq mi (7003152300000000000♠1,523 km2)
Baltimore County	005	Towson	1659	Formed from unorganized territory	Cecil Calvert, 2nd Baron Baltimore, first proprietor of the Maryland colony	7005817455000000000♠817,455	7002682000000000000♠682 sq mi (7003176600000000000♠1,766 km2)
Baltimore City	510	Baltimore City	1851	Founded in 1729. Detached in 1851 from Baltimore County	Cecil Calvert, 2nd Baron Baltimore, first proprietor of the Maryland colony	7005621342000000000♠621,342	7001920000000000000♠92 sq mi (7002238000000000000♠238 km2)
Calvert County	009	Prince Frederick	1654	Formed as Patuxent County from unorganized territory. Renamed Calvert County in 1658	The Calvert family; prior to 1658 it was called Patuxent County, after the Patuxent Indians, a branch of the Algonquians	7004896280000000000♠89,628	7002345000000000000♠345 sq mi (7002894000000000000♠894 km2)
Caroline County	011	Denton	1773	From parts of Dorchester County and Queen Anne's County	Lady Caroline Eden, daughter of Charles Calvert, 5th Baron Baltimore	7004327180000000000♠32,718	7002326000000000000♠326 sq mi (7002844000000000000♠844 km2)
Carroll County	013	Westminster	1837	From parts of Baltimore County and Frederick County	Charles Carroll of Carrollton, a representative to the Continental Congress and signatory of the Declaration of Independence	7005167217000000000♠167,217	7002452000000000000♠452 sq mi (7003117100000000000♠1,171 km2)
Cecil County	015	Elkton	1672	From parts of Baltimore County and Kent County	Cecil is an Anglicized form of the first name of Cecil Calvert, 2nd Baron Baltimore	7005101696000000000♠101,696	7002418000000000000♠418 sq mi (7003108300000000000♠1,083 km2)
Charles County	017	La Plata	1658	From unorganized territory	Charles Calvert, 3rd Baron Baltimore, second proprietor of the Maryland colony	7005150592000000000♠150,592	7002643000000000000♠643 sq mi (7003166500000000000♠1,665 km2)
Dorchester County	019	Cambridge	1668	From unorganized territory	Dorchester in Dorset, England; the Earl of Dorset was a friend of the Calvert family	7004325510000000000♠32,551	7002540000000000000♠540 sq mi (7003139900000000000♠1,399 km2)
Frederick County	021	Frederick	1748	From part of Prince George's County	Frederick Calvert, 6th Baron Baltimore, final proprietor of the Maryland colony	7005239582000000000♠239,582	7002667000000000000♠667 sq mi (7003172800000000000♠1,728 km2)
Garrett County	023	Oakland	1872	From part of Allegany County	John Work Garrett, president of the Baltimore and Ohio Railroad	7004298540000000000♠29,854	7002656000000000000♠656 sq mi (7003169900000000000♠1,699 km2)
Harford County	025	Bel Air	1773	From part of Baltimore County	Henry Harford, illegitimate son of Frederick Calvert, 6th Baron Baltimore	7005248622000000000♠248,622	7002527000000000000♠527 sq mi (7003136500000000000♠1,365 km2)
Howard County	027	Ellicott City	1851	From parts of Anne Arundel County and Baltimore County	John Eager Howard, an American Revolutionary War officer and governor of Maryland	7005299430000000000♠299,430	7002254000000000000♠254 sq mi (7002658000000000000♠658 km2)
Kent County	029	Chestertown	1642	From unorganized territory	The English county of Kent	7004201910000000000♠20,191	7002414000000000000♠414 sq mi (7003107200000000000♠1,072 km2)
Montgomery County	031	Rockville	1776	From part of Frederick County	Richard Montgomery, an American Revolutionary War general	7006100470900000000♠1,004,709	7002507000000000000♠507 sq mi (7003131300000000000♠1,313 km2)
Upper Marlboro	1696	From parts of Calvert County and Charles County	Queen Anne of Great Britain	7005881138000000000♠881,138	7002498000000000000♠498 sq mi (7003129000000000000♠1,290 km2)
Queen Anne's County	035	Centreville	1706	From parts of Talbot County	Anne, Queen of Great Britain	7004485950000000000♠48,595	7002510000000000000♠510 sq mi (7003132100000000000♠1,321 km2)
Saint Mary's County	037	Leonardtown	1637	From unorganized territory. Was named Potomac County between 1654 and 1658.	The Virgin Mary, first county named in a colony intended to be a haven for Catholics	7005108987000000000♠108,987	7002611000000000000♠611 sq mi (7003158200000000000♠1,582 km2)
Somerset County	039	Princess Anne	1666	From unorganized territory.	Mary, Lady Somerset, sister-in-law of Cecil Calvert, 2nd Baron Baltimore	7004262530000000000♠26,253	7002611000000000000♠611 sq mi (7003158200000000000♠1,582 km2)
Talbot County	041	Easton	1662	From part of Kent County	Grace, Lady Talbot, sister of Cecil Calvert, 2nd Baron Baltimore	7004380980000000000♠38,098	7002477000000000000♠477 sq mi (7003123500000000000♠1,235 km2)
Washington County	043	Hagerstown	1776	From part of Frederick County	President of the United States	7005149180000000000♠149,180	7002468000000000000♠468 sq mi (7003121200000000000♠1,212 km2)
Wicomico County	045	Salisbury	1867	From parts of Somerset County and Worcester County	The Wicomico River; in Lenape, wicko mekee indicated "a place where houses are built," possibly in reference to a settlement	7005100647000000000♠100,647	7002400000000000000♠400 sq mi (7003103600000000000♠1,036 km2)
Worcester County	047	Snow Hill	1742	From part of Somerset County	Mary Arundell, the wife of Sir John Somerset, son of the 1st Marquess of Worcester, and sister of Anne Arundell, the wife of Cecil Calvert, 2nd Baron Baltimore	7004515780000000000♠51,578	7002695000000000000♠695 sq mi (7003180000000000000♠1,800 km2)

Defunct counties

References

State of Maryland Annapolis (capital) Topics Index Cities Government History People Congressional Delegations Congressional Maps Visitor attractions Society Culture Crime Demographics Economy Education Politics Sports Regions Allegheny Mountains Atlantic Coastal Plain Baltimore‑Washington Metro Area Blue Ridge Chesapeake Cumberland Valley Delaware Valley Delmarva Peninsula Eastern Shore Piedmont Ridge and Valley Southern Maryland Western Maryland Western Shore Cities Aberdeen Annapolis Baltimore Bowie Cambridge College Park Cumberland Frederick Gaithersburg Greenbelt Hagerstown Havre de Grace Laurel Rockville Salisbury Takoma Park Westminster Towns Bel Air Brunswick Denton Easton Elkton Ocean City Port Deposit CDPs Arbutus Arnold Aspen Hill Baltimore Highlands Bethesda Camp Springs Carney Catonsville Chillum Clinton Cockeysville-Hunt Valley Colesville Columbia Crofton Dundalk Edgewood Eldersburg Elkridge Ellicott City Essex Fairland Ferndale Fort Washington Germantown Glen Burnie Green Haven Hillcrest Heights Landover Langley Park Lanham Lansdowne Lochearn Lutherville Middle River Milford Mill Montgomery Village Odenton Olney Owings Mills Oxon Hill Parkville Perry Hall Pikesville Potomac Randallstown Redland Reisterstown Rosedale St. Charles Severn Severna Park Silver Spring South Gate Suitland Timonium Towson Waldorf Wheaton-Glenmont White Oak Woodlawn Counties Allegany Anne Arundel Baltimore Calvert Caroline Carroll Cecil Charles Dorchester Frederick Garrett Harford Howard Kent Montgomery Queen Anne's St. Mary's Somerset Talbot Washington Wicomico Worcester