RANKING · 2020 CENSUS · 24 SHOWN OF 24

Fastest shrinking, Maryland counties · 2020

Maryland counties with the steepest population decline from the 2010 census to 2020. This list covers the 24 counties in Maryland that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Allegany County, MDMD66,848-9.3%+43449%

02Somerset County, MDMD24,973-7.0%−225%

03Baltimore, MDMD569,997-5.7%−51%

04Kent County, MDMD19,565-4.9%−165%

05Garrett County, MDMD28,370-4.3%−171%

06Talbot County, MDMD38,238-0.7%−106%

07Dorchester County, MDMD33,628-0.3%−118%

08Caroline County, MDMD34,116+0.7%−93%

09Worcester County, MDMD54,459+2.0%−94%

10Cecil County, MDMD107,131+2.6%−87%

11Carroll County, MDMD176,677+3.4%−85%

12Queen Anne's County, MDMD54,448+4.3%−78%

13Calvert County, MDMD94,484+4.6%−90%

14Wicomico County, MDMD106,899+4.9%−65%

15Washington County, MDMD157,731+4.9%−43%

16Baltimore County, MDMD847,650+6.1%−32%

17Harford County, MDMD266,446+6.6%−67%

18St. Mary's County, MDMD116,692+8.2%−39%

19Montgomery County, MDMD1,074,582+9.3%−40%

20Anne Arundel County, MDMD603,380+9.4%−36%

21Prince George's County, MDMD970,374+12.0%+21%

22Charles County, MDMD176,593+13.7%−29%

23Howard County, MDMD339,183+15.8%−51%

24Frederick County, MDMD302,883+16.4%−45%

SHOWING 1–24 OF 24

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