County Maps US

Maryland County Map

Maryland has 24 counties. That is 23 counties and 1 independent city, together home to 6,265,347 people.

Neighbouring areas are given different colours so their shared borders read clearly. These colours carry no data.

Boundaries from the 2025 Census cartographic boundary file, generalised so that no point moves by more than half a pixel at this width. Select any area to open its page.
Counties
24
38th most of the 51 states and DC
Population
6,265,347
19th largest
Land area
9,711
square miles
Density
645.2
people per square mile, computed

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025. Retrieved 30 August 2026.

Download this map

Free to use and redistribute. The boundaries are public-domain Census Bureau data; attribution to County Maps US is appreciated but not required.

Satellite view

Aerial imagery of Maryland with the state boundary drawn on top. County lines are not drawn here: at this scale they would bury the picture, and the map above already carries them.

Aerial view of Maryland from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 460 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

The extremes of Maryland

Most populous

Montgomery County

1,074,582

Least populous

Kent County

19,565

Largest by land area

Frederick County

660.6 sq mi

Smallest by land area

Baltimore city

80.9 sq mi

Most densely populated

Baltimore city

7,042 per sq mi

Highest median household income

Howard County

$149,763

Which is the largest county in Maryland? The answer depends on whether you mean area or population.

The counties, by shape

Every one, drawn to its own scale so the small ones stay recognisable. Shape alone is not a size comparison; the table below carries the areas.

What the map does not say

The counties of Maryland are nowhere near the same size. Frederick County covers 660.6 sq mi of land, 8.2 times the 80.9 sq mi of Baltimore city. People are spread even less evenly: Baltimore city packs 7,042 per sq mi while Garrett County holds 43.7 per sq mi.

They were not drawn in one sitting either. St. Mary's County dates to 1637, and the boundaries were still being redrawn when Garrett County was organised in 1872, 235 years later. Founding years come from Wikidata and are worth checking against the county's own history before citing.

Water is part of the picture too: 53.1% of St. Mary's County is water, the most in the state, which is why its land area and total area disagree. And 12 of the 24 counties here share their names with counties in other states, so searching by name alone can land in the wrong place; the A to Z index lists every duplicate.

All 24 counties of Maryland

Sortable on any column. This table doubles as the text alternative to the map above: every area is a link, in alphabetical order, whether or not the map renders.

The 24 counties of Maryland, with population, land area, density, median household income, county seat and FIPS code.
NamePopulationLand areaDensityMedian incomeSeatFIPS
Allegany County66,848422.2 sq mi158 per sq mi$59,603Cumberland24001
Anne Arundel County603,380414.8 sq mi1,455 per sq mi$124,911Annapolis24003
Baltimore city569,99780.9 sq mi7,042 per sq mi$62,177Baltimore city24510
Baltimore County847,650598.4 sq mi1,417 per sq mi$91,768Towson24005
Calvert County94,484213.2 sq mi443 per sq mi$133,922Prince Frederick24009
Caroline County34,116319.4 sq mi107 per sq mi$68,457Denton24011
Carroll County176,677447.6 sq mi395 per sq mi$118,211Westminster24013
Cecil County107,131346.3 sq mi309 per sq mi$92,007Elkton24015
Charles County176,593457.8 sq mi386 per sq mi$122,816La Plata24017
Dorchester County33,628540.8 sq mi62.2 per sq mi$61,839Cambridge24019
Frederick County302,883660.6 sq mi458 per sq mi$122,002Frederick24021
Garrett County28,370649.1 sq mi43.7 per sq mi$67,688Oakland24023
Harford County266,446437.1 sq mi610 per sq mi$112,265Bel Air24025
Howard County339,183251 sq mi1,352 per sq mi$149,763Ellicott City24027
Kent County19,565276.9 sq mi70.6 per sq mi$80,147Chestertown24029
Montgomery County1,074,582493.1 sq mi2,179 per sq mi$132,450Rockville24031
Prince George's County970,374482.6 sq mi2,011 per sq mi$101,798Upper Marlboro24033
Queen Anne's County54,448371.7 sq mi146 per sq mi$112,826Centreville24035
Somerset County24,973319.7 sq mi78.1 per sq mi$64,943Princess Anne24039
St. Mary's County116,692358.6 sq mi325 per sq mi$119,446Leonardtown24037
Talbot County38,238268.6 sq mi142 per sq mi$84,811Easton24041
Washington County157,731457.8 sq mi345 per sq mi$77,747Hagerstown24043
Wicomico County106,899374.4 sq mi286 per sq mi$76,210Salisbury24045
Worcester County54,459468.3 sq mi116 per sq mi$81,745Snow Hill24047

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

The ten most populous

  1. Montgomery County1,074,582
  2. Prince George's County970,374
  3. Baltimore County847,650
  4. Anne Arundel County603,380
  5. Baltimore city569,997
  6. Howard County339,183
  7. Frederick County302,883
  8. Harford County266,446
  9. Carroll County176,677
  10. Charles County176,593

Data on this page last rebuilt 30 August 2026. How these figures are produced.