RANKING · 2010 CENSUS · 24 SHOWN OF 24

Fastest growing, Maryland counties · 2010

Maryland counties ranked by population growth since the prior decennial census. 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 densely populated Most sparsely populated Best broadband access Worst broadband access

YEAR2000 2010 2020

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01St. Mary's County, MDMD116,692+22.0%+63%

02Charles County, MDMD176,593+21.6%+13%

03Frederick County, MDMD302,883+19.5%−35%

04Calvert County, MDMD94,484+19.0%−58%

05Queen Anne's County, MDMD54,448+17.8%−8%

06Cecil County, MDMD107,131+17.6%−14%

07Wicomico County, MDMD106,899+16.6%+20%

08Howard County, MDMD339,183+15.8%−51%

09Harford County, MDMD266,446+12.0%−40%

10Washington County, MDMD157,731+11.8%+36%

11Talbot County, MDMD38,238+11.7%+10%

12Montgomery County, MDMD1,074,582+11.3%−27%

13Caroline County, MDMD34,116+11.1%+9%

14Carroll County, MDMD176,677+10.8%−52%

15Worcester County, MDMD54,459+10.6%−68%

16Anne Arundel County, MDMD603,380+9.8%−33%

17Prince George's County, MDMD970,374+7.7%−22%

18Somerset County, MDMD24,973+7.0%+25%

19Baltimore County, MDMD847,650+6.7%−25%

20Dorchester County, MDMD33,628+6.3%+337%

21Kent County, MDMD19,565+5.2%−31%

22Garrett County, MDMD28,370+0.8%−86%

23Allegany County, MDMD66,848+0.2%−1081%

24Baltimore, MDMD569,997-4.6%−60%

SHOWING 1–24 OF 24

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES