RANKING · 2025 ESTIMATES · 24 SHOWN OF 24

Most population lost, Maryland counties

Maryland counties that lost the most residents from the 2020 census to 2025, by raw count of people rather than percentage. This list covers the 24 counties in Maryland that qualify, ranked against each other statewide. The median across all 24 is +3,026. Biggest climber in the top 100 since 2020: Baltimore County, MD, up 19 places to #2.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Baltimore, MDMD569,997-15,711−81%

02▲19Baltimore County, MDMD847,650-6,885−111%

03▼1Allegany County, MDMD66,848-1,258+7763%

04Garrett County, MDMD28,370-436−126%

05▼2Somerset County, MDMD24,973+353−73%

06▼1Kent County, MDMD19,565+367−73%

07▼1Talbot County, MDMD38,238+712−78%

08Caroline County, MDMD34,116+823−70%

09▼2Dorchester County, MDMD33,628+1,097+150%

10▲2Calvert County, MDMD94,484+1,701−93%

11▼2Worcester County, MDMD54,459+1,999−83%

12▲4St. Mary's County, MDMD116,692+2,915−72%

13▲2Washington County, MDMD157,731+3,026−71%

14▲10Prince George's County, MDMD970,374+3,173−96%

15▼2Wicomico County, MDMD106,899+3,311−68%

16▼5Cecil County, MDMD107,131+3,406−77%

17▼3Carroll County, MDMD176,677+3,786−86%

18▼8Queen Anne's County, MDMD54,448+4,574−31%

19▼2Harford County, MDMD266,446+5,522−85%

20Howard County, MDMD339,183+6,866−89%

21▼3Charles County, MDMD176,593+9,976−49%

22▲1Montgomery County, MDMD1,074,582+12,521−89%

23▼1Anne Arundel County, MDMD603,380+15,119−76%

24▼5Frederick County, MDMD302,883+31,166−31%

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES