RANKING · 2020 CENSUS · 24 SHOWN OF 24

Fastest growing, Maryland counties · 2020

Maryland counties ranked by population growth 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 shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Frederick County, MDMD302,883+16.4%−45%

02Howard County, MDMD339,183+15.8%−51%

03Charles County, MDMD176,593+13.7%−29%

04Prince George's County, MDMD970,374+12.0%+21%

05Anne Arundel County, MDMD603,380+9.4%−36%

06Montgomery County, MDMD1,074,582+9.3%−40%

07St. Mary's County, MDMD116,692+8.2%−39%

08Harford County, MDMD266,446+6.6%−67%

09Baltimore County, MDMD847,650+6.1%−32%

10Washington County, MDMD157,731+4.9%−43%

11Wicomico County, MDMD106,899+4.9%−65%

12Calvert County, MDMD94,484+4.6%−90%

13Queen Anne's County, MDMD54,448+4.3%−78%

14Carroll County, MDMD176,677+3.4%−85%

15Cecil County, MDMD107,131+2.6%−87%

16Worcester County, MDMD54,459+2.0%−94%

17Caroline County, MDMD34,116+0.7%−93%

18Dorchester County, MDMD33,628-0.3%−118%

19Talbot County, MDMD38,238-0.7%−106%

20Garrett County, MDMD28,370-4.3%−171%

21Kent County, MDMD19,565-4.9%−165%

22Baltimore, MDMD569,997-5.7%−51%

23Somerset County, MDMD24,973-7.0%−225%

24Allegany County, MDMD66,848-9.3%+43449%

SHOWING 1–24 OF 24

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