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.

Flip the list · Fastest growing, US counties →

MarylandAll states All rankings

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%−9.3 pts

02Somerset County, MDMD24,973-7.0%−12.6 pts

03Baltimore, MDMD569,997-5.7%+5.9 pts

04Kent County, MDMD19,565-4.9%−12.5 pts

05Garrett County, MDMD28,370-4.3%−10.4 pts

06Talbot County, MDMD38,238-0.7%−11.4 pts

07Dorchester County, MDMD33,628-0.3%−1.7 pts

08Caroline County, MDMD34,116+0.7%−9.4 pts

09Worcester County, MDMD54,459+2.0%−30.9 pts

10Cecil County, MDMD107,131+2.6%−17.9 pts

11Carroll County, MDMD176,677+3.4%−18.9 pts

12Queen Anne's County, MDMD54,448+4.3%−15.1 pts

13Calvert County, MDMD94,484+4.6%−40.6 pts

14Wicomico County, MDMD106,899+4.9%−8.9 pts

15Washington County, MDMD157,731+4.9%−3.7 pts

16Baltimore County, MDMD847,650+6.1%−2.8 pts

17Harford County, MDMD266,446+6.6%−13.4 pts

18St. Mary's County, MDMD116,692+8.2%−5.3 pts

19Montgomery County, MDMD1,074,582+9.3%−6.1 pts

20Anne Arundel County, MDMD603,380+9.4%−5.2 pts

21Prince George's County, MDMD970,374+12.0%+2.1 pts

22Charles County, MDMD176,593+13.7%−5.5 pts

23Howard County, MDMD339,183+15.8%−16.5 pts

24Frederick County, MDMD302,883+16.4%−13.6 pts

SHOWING 1–24 OF 24

Download CSV (full list, 24 rows)

UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS