RANKING · 2010 CENSUS · 24 SHOWN OF 24

Most population lost, Maryland counties · 2010

Maryland counties that lost the most residents from the 2000 census to 2010, 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, MDMD569,997-30,193−64%

02Allegany County, MDMD66,848+157−1081%

03Garrett County, MDMD28,370+251−85%

04Kent County, MDMD19,565+1,000−26%

05Somerset County, MDMD24,973+1,723+32%

06Dorchester County, MDMD33,628+1,944+344%

07Caroline County, MDMD34,116+3,294+20%

08Talbot County, MDMD38,238+3,970+22%

09Worcester County, MDMD54,459+4,911−57%

10Queen Anne's County, MDMD54,448+7,235+9%

11Wicomico County, MDMD106,899+14,089+37%

12Calvert County, MDMD94,484+14,174−39%

13Cecil County, MDMD107,131+15,157+4%

14Washington County, MDMD157,731+15,507+47%

15Carroll County, MDMD176,677+16,237−41%

16St. Mary's County, MDMD116,692+18,940+85%

17Charles County, MDMD176,593+26,005+34%

18Harford County, MDMD266,446+26,236−28%

19Frederick County, MDMD302,883+38,108−15%

20Howard County, MDMD339,183+39,243−35%

21Anne Arundel County, MDMD603,380+48,000−23%

22Baltimore County, MDMD847,650+50,737−18%

23Prince George's County, MDMD970,374+61,905−14%

24Montgomery County, MDMD1,074,582+98,436−15%

SHOWING 1–24 OF 24

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