RANKING · 2020 CENSUS · 24 SHOWN OF 24

Most population lost, Maryland counties · 2020

Maryland counties that lost the most residents from the 2010 census to 2020, by raw count of people rather than percentage. This list covers the 24 counties in Maryland that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Baltimore, MDMD569,997-35,253−58%

02Allegany County, MDMD66,848-6,981+43531%

03Somerset County, MDMD24,973-1,850−242%

04Garrett County, MDMD28,370-1,291−176%

05Kent County, MDMD19,565-999−174%

06Talbot County, MDMD38,238-256−108%

07Dorchester County, MDMD33,628-87−120%

08Caroline County, MDMD34,116+227−92%

09Worcester County, MDMD54,459+1,006−91%

10Queen Anne's County, MDMD54,448+2,076−69%

11Cecil County, MDMD107,131+2,617−82%

12Calvert County, MDMD94,484+4,046−83%

13Wicomico County, MDMD106,899+4,855−53%

14Carroll County, MDMD176,677+5,757−79%

15Washington County, MDMD157,731+7,275−31%

16St. Mary's County, MDMD116,692+8,626−16%

17Harford County, MDMD266,446+16,098−56%

18Charles County, MDMD176,593+20,066+3%

19Frederick County, MDMD302,883+38,332−15%

20Howard County, MDMD339,183+45,232−25%

21Baltimore County, MDMD847,650+49,506−20%

22Anne Arundel County, MDMD603,380+50,605−19%

23Montgomery County, MDMD1,074,582+90,284−22%

24Prince George's County, MDMD970,374+103,781+44%

SHOWING 1–24 OF 24

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