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Maryland county map

See all 24 counties and an independent city on one clear, labelled map. Use the alphabetical table below to verify names and compare land area.

Boundary vintage: 2025Source: U.S. Census BureauUpdated September 15, 2026
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Labelled map of Maryland counties and an independent city AlleganyAnne ArundelBaltimoreBaltimoreCalvertCarolineCarrollCecilCharlesDorchesterFrederickGarrettHarfordHowardKentMontgomeryPrince George'sQueen Anne'sSomersetSt. Mary'sTalbotWashingtonWicomicoWorcester
Boundary data: U.S. Census Bureau 2025 cartographic boundary files. Zoom in for county names, then drag the map or use the arrow keys to move around.
Map scope: This is a county boundary reference map. It does not show roads, parcels, ZIP codes, election precincts, or terrain.

Alphabetical list of Maryland counties and an independent city

The land-area figures are rounded to the nearest square mile. Water area is shown separately so large lakes or coastal waters do not obscure the comparison.

NameFIPS codeLand areaWater area
Allegany County24001422 sq mi6 sq mi
Anne Arundel County24003415 sq mi173 sq mi
Baltimore city2451081 sq mi11 sq mi
Baltimore County24005598 sq mi83 sq mi
Calvert County24009213 sq mi132 sq mi
Caroline County24011319 sq mi6 sq mi
Carroll County24013448 sq mi5 sq mi
Cecil County24015346 sq mi72 sq mi
Charles County24017458 sq mi185 sq mi
Dorchester County24019541 sq mi442 sq mi
Frederick County24021661 sq mi7 sq mi
Garrett County24023649 sq mi9 sq mi
Harford County24025437 sq mi90 sq mi
Howard County24027251 sq mi2 sq mi
Kent County24029277 sq mi137 sq mi
Montgomery County24031493 sq mi14 sq mi
Prince George's County24033483 sq mi16 sq mi
Queen Anne's County24035372 sq mi139 sq mi
Somerset County24039320 sq mi291 sq mi
St. Mary's County24037359 sq mi406 sq mi
Talbot County24041269 sq mi208 sq mi
Washington County24043458 sq mi10 sq mi
Wicomico County24045374 sq mi26 sq mi
Worcester County24047468 sq mi227 sq mi

Largest Maryland counties and an independent city by land area

These are the five largest mapped units in Maryland by Census-reported land area:

  1. Frederick County — 661 square miles
  2. Garrett County — 649 square miles
  3. Baltimore County — 598 square miles
  4. Dorchester County — 541 square miles
  5. Montgomery County — 493 square miles

How to read and use this map

County lines are administrative boundaries, not postal routes. A mailing address can use a city name associated with a neighboring area, and ZIP codes can cross county lines. When you need to identify a county for an address, confirm it with an official geocoder or local government source.

For classroom or planning use, print directly from this page. If labels become crowded, choose landscape orientation and reduce page margins. The underlying vector lines remain crisp at different sizes.

Frequently asked questions

How many counties and an independent city are in Maryland?

Maryland has 24 counties and an independent city in the U.S. Census Bureau’s 2025 cartographic boundary file.

Can I print this Maryland county map?

Yes. Choose Print map and use landscape orientation for the widest map. Because the map is SVG, its boundary lines stay sharp when scaled.

Are these legal survey boundaries?

No. This is a generalized reference map. Property, parcel, election, and legal boundary questions should be checked with the relevant state or local agency.

Map source

U.S. Census Bureau, 2025 Cartographic Boundary File, Counties, 1:20,000,000. Land and water area fields are supplied in the same file and converted from square meters to square miles. Accessed September 15, 2026.