RANKING · 2010 CENSUS · 24 SHOWN OF 24

Largest by population, Maryland counties · 2010

The most populous Maryland counties as of the 2010 population estimates. This list covers the 24 counties in Maryland that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDFastest growing Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS 2000

01Montgomery County, MDMD971,777+11%

02Prince George's County, MDMD863,420+8%

03Baltimore County, MDMD805,029+7%

04Baltimore, MDMD620,961−5%

05Anne Arundel County, MDMD537,656+10%

06Howard County, MDMD287,085+16%

07Harford County, MDMD244,826+12%

08Frederick County, MDMD233,385+20%

09Carroll County, MDMD167,134+11%

10Washington County, MDMD147,430+12%

11Charles County, MDMD146,551+22%

12St. Mary's County, MDMD105,151+22%

13Cecil County, MDMD101,108+18%

14Wicomico County, MDMD98,733+17%

15Calvert County, MDMD88,737+19%

16Allegany County, MDMD75,087+0%

17Worcester County, MDMD51,454+11%

18Queen Anne's County, MDMD47,798+18%

19Talbot County, MDMD37,782+12%

20Caroline County, MDMD33,066+11%

21Dorchester County, MDMD32,618+6%

22Garrett County, MDMD30,097+1%

23Somerset County, MDMD26,470+7%

24Kent County, MDMD20,197+5%

SHOWING 1–24 OF 24

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS