RANKING · 2020 CENSUS · 16 SHOWN OF 16

Fastest growing, Maine counties · 2020

Maine counties ranked by population growth from the 2010 census to 2020. This list covers the 16 counties in Maine 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

01Cumberland County, MEME317,222+7.6%−18%

02York County, MEME222,434+7.5%−44%

03Sagadahoc County, MEME37,979+4.0%−20%

04Androscoggin County, MEME116,487+3.2%−329%

05Lincoln County, MEME36,595+2.3%−79%

06Knox County, MEME41,117+2.2%−76%

07Waldo County, MEME40,693+2.1%−79%

08Hancock County, MEME57,171+1.9%−81%

09Kennebec County, MEME129,067+1.2%+17%

10Oxford County, MEME60,346-0.1%−102%

11Penobscot County, MEME157,967-1.1%−2%

12Somerset County, MEME51,620-3.4%−249%

13Piscataquis County, MEME17,409-4.2%−45%

14Franklin County, MEME30,824-4.3%−369%

15Washington County, MEME31,334-5.4%+38%

16Aroostook County, MEME66,609-6.6%−56%

SHOWING 1–16 OF 16

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