| Independent city and counties of Maryland | |
|---|---|
| Location | State of Maryland |
| Number | 23 counties and 1 Independent city |
| Populations | (Counties only): 19,557 (Kent) – 1,082,273 (Montgomery) |
| Areas | (Counties only): 254 square miles (660 km2) (Howard) – 983 square miles (2,550 km2) (Dorchester) |
| Government | |
| Subdivisions |
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There are 23counties and oneindependent city in the U.S. state ofMaryland. Many of the counties in Maryland were named for relatives of theBarons Baltimore, who were the proprietors of the Maryland colony from its founding in 1634 through 1771. The Barons Baltimore wereCatholic, andGeorge Calvert, 1st Baron Baltimore, originally intended that the colony be a haven for English Catholics, though for most of its history Maryland has had a majority ofProtestants.[1]
Though formally an independent city rather than a county, theCity of Baltimore is considered the equal of a county for most purposes and is functionally a county-equivalent in most respects.
The most recent county formation in Maryland occurred in 1872 whenGarrett County was split fromAllegany County.[2] However, there have been numerous changes to county borders since that time, most recently when portions of the city ofTakoma Park that had previously been part ofPrince George's County were absorbed intoMontgomery County in 1997.[3]
Within Maryland 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.[4] Many of the state's most populous and economically important communities, such asBethesda,Silver Spring,Columbia, andTowson areunincorporated and receive their municipal services from the county.[5] In fact, there are no incorporated municipalities at all in Baltimore County orHoward County.[6][7] The county-equivalent is also the provider of public schools asschool districts do not exist as a separate level of government in Maryland.[8]
The City of Baltimore is an entity nearly surrounded by but separate from theCounty of Baltimore. The City has been considered on par with the counties within the state since it became anindependent city after it separated from Baltimore County in 1851.[9]
TheFederal Information Processing Standard (FIPS) code, which is used by the United States government to uniquely identify states and counties, is provided with each entry.[10] Maryland's code is 24, which when combined with any county code would be written as 24XXX.[11][12] The FIPS code for each county links to census data for that county.
| County | FIPS code[13] | County seat[2][14] | Est.[2][14] | Origin[2] | Etymology[2] | Flag | Seal | Population (2024)[15] | Area[14][15] | Map |
|---|---|---|---|---|---|---|---|---|---|---|
| Allegany County | 001 | Cumberland | 1789 | Formed from part of Washington County | FromLenapeoolikhanna, which means "beautiful stream" | 67,097 | 430 sq mi (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 ofCecil Calvert, 2nd Baron Baltimore. Between 1654 and 1658 it was known asProvidence County byPuritan settlers | 602,350 | 588 sq mi (1,523 km2) | |||
| Baltimore County | 005 | Towson | 1659 | Formed from unorganized territory | Cecil Calvert, 2nd Baron Baltimore, first proprietor of theMaryland colony | 852,425 | 682 sq mi (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 theMaryland colony | 568,271 | 92 sq mi (238 km2) | |||
| Calvert County | 009 | Prince Frederick | 1654 | Formed as Patuxent County from unorganized territory. Renamed Calvert County in 1658 | TheCalvert family; prior to 1658 it was called Patuxent County, after the Patuxent Indians, a branch of theAlgonquians | 94,913 | 345 sq mi (894 km2) | |||
| Caroline County | 011 | Denton | 1773 | From parts of Dorchester County and Queen Anne's County | Lady Caroline Eden, daughter ofCharles Calvert, 5th Baron Baltimore | 34,248 | 326 sq mi (844 km2) | |||
| Carroll County | 013 | Westminster | 1837 | From parts of Baltimore County and Frederick County | Charles Carroll of Carrollton, a representative to theContinental Congress and signatory of theDeclaration of Independence | 177,108 | 452 sq mi (1,171 km2) | |||
| Cecil County | 015 | Elkton | 1674 | From parts of Baltimore County and Kent County | Cecil is an Anglicized form of the first name ofCecil Calvert, 2nd Baron Baltimore | 106,305 | 418 sq mi (1,083 km2) | |||
| Charles County | 017 | La Plata | 1658 | From unorganized territory | Charles Calvert, 3rd Baron Baltimore, second proprietor of theMaryland colony | 174,478 | 643 sq mi (1,665 km2) | |||
| Dorchester County | 019 | Cambridge | 1668 | From unorganized territory | Dorchester in Dorset, England; theEarl of Dorset was a friend of the Calvert family | 33,138 | 983 sq mi (2,546 km2) | |||
| Frederick County | 021 | Frederick | 1748 | From part of Prince George's County | Frederick Calvert, 6th Baron Baltimore, final proprietor of theMaryland colony | 299,317 | 667 sq mi (1,728 km2) | |||
| Garrett County | 023 | Oakland | 1872 | From part of Allegany County | John Work Garrett, president of theBaltimore and Ohio Railroad | 28,393 | 656 sq mi (1,699 km2) | |||
| Harford County | 025 | Bel Air | 1773 | From part of Baltimore County | Henry Harford, illegitimate son ofFrederick Calvert, 6th Baron Baltimore | 265,514 | 527 sq mi (1,365 km2) | |||
| Howard County | 027 | Ellicott City | 1851 | From parts of Anne Arundel County and Baltimore County | John Eager Howard, anAmerican Revolutionary War officer andgovernor of Maryland | 339,668 | 254 sq mi (658 km2) | |||
| Kent County | 029 | Chestertown | 1642 | From unorganized territory | The English county ofKent | 19,557 | 414 sq mi (1,072 km2) | |||
| Montgomery County | 031 | Rockville | 1776 | From part of Frederick County | Richard Montgomery, anAmerican Revolutionary War general | 1,082,273 | 507 sq mi (1,313 km2) | |||
| Prince George's County | 033 | Upper Marlboro | 1696 | From parts of Calvert County and Charles County | Prince George of Denmark, the husband of QueenAnne of Great Britain | 966,629 | 498 sq mi (1,290 km2) | |||
| Queen Anne's County | 035 | Centreville | 1706 | From parts of Talbot County | Anne, Queen of Great Britain | 53,688 | 510 sq mi (1,321 km2) | |||
| Somerset County | 039 | Princess Anne | 1666 | From unorganized territory. | Mary, Lady Somerset, sister-in-law ofCecil Calvert, 2nd Baron Baltimore | 25,241 | 611 sq mi (1,582 km2) | |||
| St. 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 | 116,469 | 611 sq mi (1,582 km2) | |||
| Talbot County | 041 | Easton | 1662 | From part of Kent County | Grace, Lady Talbot, sister ofCecil Calvert, 2nd Baron Baltimore | 38,244 | 477 sq mi (1,235 km2) | |||
| Washington County | 043 | Hagerstown | 1776 | From part of Frederick County | George Washington, first President of the United States | 157,228 | 468 sq mi (1,212 km2) | |||
| Wicomico County | 045 | Salisbury | 1867 | From parts of Somerset County and Worcester County | TheWicomico River; inLenape,wicko mekee indicated "a place where houses are built", possibly in reference to a settlement | 106,329 | 400 sq mi (1,036 km2) | |||
| Worcester County | 047 | Snow Hill | 1742 | From part of Somerset County | Mary Arundell, the wife of Sir John Somerset, son ofHenry Somerset, 1st Marquess of Worcester, and sister of Anne Arundell, the wife ofCecil Calvert, 2nd Baron Baltimore | 54,337 | 695 sq mi (1,800 km2) |