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Maryland county map

Explore all 24 counties and an independent city. Select a county to see its map, or download a copy for your next project.

2025 Census boundaries24 mapped unitsCapital: Annapolis
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Boundary map 100%
Labelled map of Maryland counties and an independent city Allegany CountyAnne Arundel CountyBaltimore cityBaltimore CountyCalvert CountyCaroline CountyCarroll CountyCecil CountyCharles CountyDorchester CountyFrederick CountyGarrett CountyHarford CountyHoward CountyKent CountyMontgomery CountyPrince George's CountyQueen Anne's CountySomerset CountySt. Mary's CountyTalbot CountyWashington CountyWicomico CountyWorcester County
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2025 U.S. Census boundaries. Zoom to reveal more names. Drag to pan when zoomed; use arrow keys, + and − with the map focused.

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Choose a format for printing, editing, or sharing. All downloads are free.

SVG

SVG is editable vector artwork. PNG is a high-resolution image. PDF uses landscape Letter pages, with a separate key when needed.

Downloads contain the complete boundary map, independent of zoom. Crowded names use a numbered key. Numbered quiz maps use the county list / answer key (CSV). Boundary data (GeoJSON) · Reuse with source credit.

Roads, terrain & aerial imagery

Explore Maryland with a county boundary overlay. Choose a view to load the interactive map.

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Street names, terrain, or aerial photography with the county boundary in view.

Backgrounds load from OpenStreetMap or USGS only when selected. Imagery dates and detail vary by location.

Map scope: Use the boundary map for names and shapes, or the interactive background viewer for roads, terrain, and aerial imagery. County boundaries do not identify parcels or ZIP codes.

Maryland county geography overview

Maryland has 24 counties and an independent city, which places it 38th among the 50 state and District of Columbia maps in this atlas when ordered by number of county-level units. Their combined 9,710.8 square miles of land place the state 42nd by mapped land area.

The average county-level area is 405 square miles, while the median is 419 square miles. The median is often the better description of a typical unit because one or two very large areas can pull the average upward. The five largest units together account for about 30% of the state’s mapped land area.

24county-level units
419 sq mimedian land area
660.6 sq milargest unit
22%share of mapped area that is water

Largest and smallest Maryland counties and an independent city

Frederick County is the largest county-level unit by land area at 660.6 square miles. It represents about 7% of all mapped land in Maryland. At the other end of the range, Baltimore city has 80.9 square miles of land.

Largest by land area

  1. Frederick County660.6 sq mi
  2. Garrett County649.1 sq mi
  3. Baltimore County598.4 sq mi
  4. Dorchester County540.8 sq mi
  5. Montgomery County493.1 sq mi

Smallest by land area

  1. Baltimore city80.9 sq mi
  2. Calvert County213.2 sq mi
  3. Howard County250.9 sq mi
  4. Talbot County268.6 sq mi
  5. Kent County276.9 sq mi

Rankings use land area rather than total area. This avoids making coastal or lake counties appear larger solely because their boundaries include extensive water.

Alphabetical list of Maryland counties and an independent city

The table is alphabetical, so it works as a name and FIPS-code reference rather than an area ranking. Every identifier begins with the Maryland state FIPS prefix 24. Land and water figures are rounded to one decimal place.

24 county-level areas

Download county data / numbered map key (CSV)
No.NameFIPS codeLand areaWater area
1Allegany County24001422.2 sq mi5.7 sq mi
2Anne Arundel County24003414.8 sq mi173 sq mi
3Baltimore city2451080.9 sq mi11.1 sq mi
4Baltimore County24005598.4 sq mi83.4 sq mi
5Calvert County24009213.2 sq mi131.9 sq mi
6Caroline County24011319.4 sq mi6.5 sq mi
7Carroll County24013447.6 sq mi5.1 sq mi
8Cecil County24015346.3 sq mi71.5 sq mi
9Charles County24017457.8 sq mi185.1 sq mi
10Dorchester County24019540.8 sq mi442.2 sq mi
11Frederick County24021660.6 sq mi6.8 sq mi
12Garrett County24023649.1 sq mi8.7 sq mi
13Harford County24025437.1 sq mi89.5 sq mi
14Howard County24027250.9 sq mi2.4 sq mi
15Kent County24029276.9 sq mi136.5 sq mi
16Montgomery County24031493.1 sq mi13.8 sq mi
17Prince George's County24033482.6 sq mi16.2 sq mi
18Queen Anne's County24035371.7 sq mi139 sq mi
19Somerset County24039319.7 sq mi290.6 sq mi
20St. Mary's County24037358.6 sq mi405.7 sq mi
21Talbot County24041268.6 sq mi208.3 sq mi
22Washington County24043457.8 sq mi9.6 sq mi
23Wicomico County24045374.4 sq mi25.8 sq mi
24Worcester County24047468.3 sq mi226.6 sq mi

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, download a PDF from the controls above. Labelled exports use numbered callouts for crowded areas; numbered quiz maps match the alphabetical county list. SVG files keep the boundary lines sharp at larger paper sizes.

Interpreting the water figure: About 22% of the summed mapped area in this state is water. County water area can include coastal waters, bays, lakes, or rivers assigned by the Census boundary file; it is shown separately from land and should not be used to estimate developable land.

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 Download / print and select PDF for a landscape Letter page, PNG for an image, or SVG for editable vector artwork. Because the map is SVG, its boundary lines stay sharp when scaled.

What is the largest county-level area in Maryland?

Frederick County is the largest by land area in this dataset at 660.6 square miles. This is an area ranking, not a population ranking.

What is the smallest county-level area in Maryland?

Baltimore city is the smallest by land area in this dataset at 80.9 square miles.

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, 1:5,000,000. Land and water area fields are supplied in the same file and converted from square meters to square miles. Accessed September 27, 2026.