RANKING · 1990 CENSUS · 24 SHOWN OF 24

Largest by population, Maryland counties · 1990

The most populous us counties as of the 2023 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 densely populated Most sparsely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPTOTAL POPULATIONVS 2000

01Montgomery County, MDMD1,074,582757,027−13%

02Baltimore, MDMD569,997736,014+13%

03Prince George's County, MDMD970,374729,268−9%

04Baltimore County, MDMD847,650692,134−8%

05Anne Arundel County, MDMD603,380427,239−13%

06Howard County, MDMD339,183187,328−24%

07Harford County, MDMD266,446182,132−17%

08Frederick County, MDMD302,883150,208−23%

09Carroll County, MDMD176,677123,372−18%

10Washington County, MDMD157,731121,393−8%

11Charles County, MDMD176,593101,154−16%

12St. Mary's County, MDMD116,69275,974−12%

13Allegany County, MDMD66,84874,946+0%

14Wicomico County, MDMD106,89974,339−12%

15Cecil County, MDMD107,13171,347−17%

16Calvert County, MDMD94,48451,372−31%

17Worcester County, MDMD54,45935,028−25%

18Queen Anne's County, MDMD54,44833,953−16%

19Talbot County, MDMD38,23830,549−10%

20Dorchester County, MDMD33,62830,236−1%

21Garrett County, MDMD28,37028,138−6%

22Caroline County, MDMD34,11627,035−9%

23Somerset County, MDMD24,97323,440−5%

24Kent County, MDMD19,56517,842−7%

SHOWING 1–24 OF 24

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES