Maryland County Map
Labeled county boundary map and complete directory of all 24 counties and independent city in Maryland (MD, State FIPS 24). View 5-digit FIPS codes, county seats, land area in square miles, and official county government websites below.
Showing all 24 counties and independent city in Maryland. Use the search box below to filter by county name, 5-digit FIPS code, or county seat.
Maryland County Statistics & Summary
Total Counties and Independent City
24
Largest by Land Area
Frederick County
Smallest by Land Area
Baltimore city
Baltimore City is an independent city treated as a county-equivalent jurisdiction with its own 5-digit FIPS code alongside the state's counties.
All 24 Counties and Independent City in Maryland (FIPS, County Seat & Official Website)
| County or Independent City Name | 5-Digit FIPS | Seat / Administrative Center | Land Area (sq mi) | Coordinates | Official Website |
|---|---|---|---|---|---|
| Allegany County | 24001 | Cumberland | 422.2 | 39.612°, -78.703° | Official Site |
| Anne Arundel County | 24003 | Annapolis | 414.8 | 38.992°, -76.561° | Official Site |
| Baltimore city | 24510 | — | 80.9 | 39.300°, -76.611° | Official Site |
| Baltimore County | 24005 | Towson | 598.4 | 39.443°, -76.617° | Official Site |
| Calvert County | 24009 | Prince Frederick | 213.2 | 38.519°, -76.525° | Official Site |
| Caroline County | 24011 | Denton | 319.4 | 38.871°, -75.832° | Official Site |
| Carroll County | 24013 | Westminster | 447.6 | 39.564°, -77.015° | Official Site |
| Cecil County | 24015 | Elkton | 346.3 | 39.562°, -75.942° | Official Site |
| Charles County | 24017 | La Plata | 457.8 | 38.478°, -77.011° | Official Site |
| Dorchester County | 24019 | Cambridge | 540.8 | 38.429°, -76.047° | Official Site |
| Frederick County | 24021 | Frederick | 660.7 | 39.470°, -77.398° | Official Site |
| Garrett County | 24023 | Oakland | 649.1 | 39.547°, -79.275° | Official Site |
| Harford County | 24025 | Bel Air | 437.1 | 39.537°, -76.300° | Official Site |
| Howard County | 24027 | Ellicott City | 250.9 | 39.252°, -76.924° | Official Site |
| Kent County | 24029 | Chestertown | 276.9 | 39.241°, -76.126° | Official Site |
| Montgomery County | 24031 | Rockville | 493.1 | 39.137°, -77.203° | Official Site |
| Prince George's County | 24033 | Upper Marlboro | 482.6 | 38.829°, -76.848° | Official Site |
| Queen Anne's County | 24035 | Centreville | 371.7 | 39.047°, -76.086° | Official Site |
| Somerset County | 24039 | Princess Anne | 319.7 | 38.075°, -75.853° | Official Site |
| St. Mary's County | 24037 | Leonardtown | 358.6 | 38.223°, -76.534° | Official Site |
| Talbot County | 24041 | Easton | 268.6 | 38.747°, -76.177° | Official Site |
| Washington County | 24043 | Hagerstown | 457.8 | 39.604°, -77.815° | Official Site |
| Wicomico County | 24045 | Salisbury | 374.4 | 38.367°, -75.632° | Official Site |
| Worcester County | 24047 | Snow Hill | 468.3 | 38.222°, -75.310° | Official Site |
How Maryland Counties and Independent City and 5-Digit FIPS Codes Work
In U.S. Census Bureau TIGER/Line geography, Maryland (MD) is assigned the 2-digit state Federal Information Processing Series (FIPS) code 24 and covers 9,711 square miles of land area across 24 counties and independent city in the Eastern Time (ET) zone (with Annapolis as the state capital). Every county or independent city in the directory above carries a unique 5-digit GEOID formed by combining state prefix 24 with a 3-digit county code (ranging alphabetically from Allegany County at 24001 to Worcester County at 24047).
Because U.S. Postal Service 5-digit ZIP Codes follow mail carrier delivery routes rather than local government borders, many postal addresses in Maryland carry a neighboring city’s mailing name or sit inside a multi-county ZIP Code Tabulation Area (ZCTA). Property tax assessments, deed recording, circuit and county court venue, voter registration precincts, sheriff jurisdiction, and county sales tax rates in Maryland are determined by the legal county or independent city boundary shown on the map above rather than the postal city name on an envelope.
Land area figures in square miles and internal centroid coordinates (INTPTLAT, INTPTLON) come directly from the U.S. Census Bureau’s current TIGERweb State_County benchmark, while 23 administrative seats and 24 verified official government websites are cross-referenced from Wikidata (CC0). Need a clean outline worksheet without county labels, or want to verify which Maryland county or independent city a specific home or business address sits in? Open the Blank Map of Maryland, run a street-segment check on Address to County Lookup, check multi-county postal overlap on ZIP Code to County Lookup, or browse all 50 states on the National U.S. County Map.
Adjacent State County Maps
Explore county maps and FIPS directories for states bordering Maryland: