Sun . 19 Jun 2019

List of counties in Maryland

list of counties in maryland by zip code, list of counties in maryland usa
There are twenty-four counties and county-equivalents in the US state of Maryland 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 who were the proprietors of the Maryland colony from its founding in 1634 through 1771 The Barons Baltimore were Catholic, and George 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 of Protestants1


  • 1 History
  • 2 Alphabetical listing
  • 3 Defunct counties
  • 4 References


The last new county formation in Maryland occurred when Garrett County was formed in 1872 from portions of Allegany County2 However, there have been numerous changes to county borders since that time, most recently when portions of the city of Takoma Park that had previously been part of Prince George's County were absorbed into Montgomery County in 19973

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 entry4 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 listingedit

FIPS County Code
County seat
Allegany County 001 Cumberland 1789 Formed from part of Washington County From the Lenape Indian word oolikhanna, which means "beautiful stream" Link to image 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 Link to image 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   Link to image 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 Link to image 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   Link to image 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   Link to image 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 Link to image 7006100470900000000♠1,004,709 7002507000000000000♠507 sq mi
7003131300000000000♠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 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   Link to image 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   Link to image 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 Link to image 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 Link to image 7004380980000000000♠38,098 7002477000000000000♠477 sq mi
7003123500000000000♠1,235 km2
Washington County 043 Hagerstown 1776 From part of Frederick County George Washington, first President of the United States Link to image 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   Link to image 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 Henry Somerset, 1st Marquess of Worcester, and sister of Anne Arundell, the wife of Cecil Calvert, 2nd Baron Baltimore Link to image 7004515780000000000♠51,578 7002695000000000000♠695 sq mi
7003180000000000000♠1,800 km2

Defunct countiesedit

County Years of existence Etymology
Old Charles County 1650–1654 King Charles I of England
Durham County 1669–1672 The English County Durham
Old Worcester County 1672–1685 Mary Arundell, the wife of Sir John Somerset, son of the 1st Marquess of Worcester,
and sister of Anne Arundell, wife of Cecil Calvert, 2nd Baron Baltimore


  1. ^ Brugger, Robert J 1988 Maryland: A Middle Temperament, 1634–1980 Baltimore: Johns Hopkins Press ISBN 0-8018-3399-X
  2. ^ a b c d e "Counties" Maryland Manual Online Retrieved 2007-06-24 
  3. ^ Brown, Deneen June 28, 1997 "As Unification Nears, Takoma Park Residents Still a Divided People" The Washington Post pp A1 Retrieved 2007-06-24 
  4. ^ "FIPS Publish 6-4" National Institute of Standards and Technology Retrieved 2007-04-11 
  5. ^ "EPA County FIPS Code Listing" EPAgov Retrieved 2008-02-23 
  6. ^ a b c National Association of Counties "NACo - Find a county" Archived from the original on October 25, 2007 Retrieved 2008-04-30 
  7. ^ "American FactFinder" Factfinder2censusgov Retrieved 2012-08-15 
  8. ^ "Maryland QuickFacts" US Census Bureau Retrieved 2007-06-22 

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