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.

Flip the list · Fastest shrinking, US counties →

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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%−1.6 pts

02York County, MEME222,434+7.5%−5.9 pts

03Sagadahoc County, MEME37,979+4.0%−1.0 pts

04Androscoggin County, MEME116,487+3.2%+4.6 pts

05Lincoln County, MEME36,595+2.3%−8.5 pts

06Knox County, MEME41,117+2.2%−6.9 pts

07Waldo County, MEME40,693+2.1%−7.8 pts

08Hancock County, MEME57,171+1.9%−8.4 pts

09Kennebec County, MEME129,067+1.2%+0.2 pts

10Oxford County, MEME60,346-0.1%−4.2 pts

11Penobscot County, MEME157,967-1.1%+0.0 pts

12Somerset County, MEME51,620-3.4%−5.6 pts

13Piscataquis County, MEME17,409-4.2%+3.4 pts

14Franklin County, MEME30,824-4.3%−5.8 pts

15Washington County, MEME31,334-5.4%−1.5 pts

16Aroostook County, MEME66,609-6.6%+8.3 pts

SHOWING 1–16 OF 16

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