RANKING · 2020 CENSUS · 24 SHOWN OF 24

Most densely populated, Maryland counties · 2020

Maryland counties ranked by residents per square mile (2020). This list covers the 24 counties in Maryland that qualify, ranked against each other statewide. The median across all 24 is 338.

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SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Baltimore, MDMD569,9977,236−10%

02Montgomery County, MDMD1,074,5822,154+22%

03Prince George's County, MDMD970,3742,004+21%

04Baltimore County, MDMD847,6501,428+13%

05Anne Arundel County, MDMD603,3801,418+20%

06Howard County, MDMD339,1831,324+34%

07Harford County, MDMD266,446597+19%

08Calvert County, MDMD94,484435+24%

09Frederick County, MDMD302,883411+39%

10Carroll County, MDMD176,677386+15%

11Charles County, MDMD176,593364+38%

12Washington County, MDMD157,731338+17%

13St. Mary's County, MDMD116,692317+32%

14Cecil County, MDMD107,131300+21%

15Wicomico County, MDMD106,899277+22%

16Allegany County, MDMD66,848161−9%

17Talbot County, MDMD38,238140+11%

18Queen Anne's County, MDMD54,448134+23%

19Worcester County, MDMD54,459112+13%

20Caroline County, MDMD34,116104+12%

21Somerset County, MDMD24,97377−1%

22Kent County, MDMD19,565690%

23Dorchester County, MDMD33,62860+6%

24Garrett County, MDMD28,37044−3%

SHOWING 1–24 OF 24

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