RANKING · 1990 CENSUS · 24 SHOWN OF 24

Largest by population, Maryland counties · 1990

The most populous Maryland counties as of the 1990 population estimates. This list covers the 24 counties in Maryland that qualify, ranked against each other statewide. The median across all 24 is 75,974.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS –

01Montgomery County, MDMD757,027–

02Baltimore, MDMD736,014–

03Prince George's County, MDMD729,268–

04Baltimore County, MDMD692,134–

05Anne Arundel County, MDMD427,239–

06Howard County, MDMD187,328–

07Harford County, MDMD182,132–

08Frederick County, MDMD150,208–

09Carroll County, MDMD123,372–

10Washington County, MDMD121,393–

11Charles County, MDMD101,154–

12St. Mary's County, MDMD75,974–

13Allegany County, MDMD74,946–

14Wicomico County, MDMD74,339–

15Cecil County, MDMD71,347–

16Calvert County, MDMD51,372–

17Worcester County, MDMD35,028–

18Queen Anne's County, MDMD33,953–

19Talbot County, MDMD30,549–

20Dorchester County, MDMD30,236–

21Garrett County, MDMD28,138–

22Caroline County, MDMD27,035–

23Somerset County, MDMD23,440–

24Kent County, MDMD17,842–

SHOWING 1–24 OF 24

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS