RANKING · 2025 ESTIMATES · 16 SHOWN OF 16

Fastest growing, Maine counties

Maine counties ranked by population growth from the 2020 census to 2025. 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

01York County, MEME222,434+4.9%−8.5 pts

02Androscoggin County, MEME116,487+4.8%+6.2 pts

03Cumberland County, MEME317,222+4.7%−4.6 pts

04Franklin County, MEME30,824+4.6%+3.1 pts

05Oxford County, MEME60,346+4.4%+0.4 pts

06Kennebec County, MEME129,067+4.4%+3.3 pts

07Lincoln County, MEME36,595+3.9%−6.9 pts

08Penobscot County, MEME157,967+3.8%+4.9 pts

09Piscataquis County, MEME17,409+3.6%+11.2 pts

10Sagadahoc County, MEME37,979+3.5%−1.5 pts

11Hancock County, MEME57,171+3.1%−7.3 pts

12Waldo County, MEME40,693+2.7%−7.1 pts

13Somerset County, MEME51,620+2.3%+0.0 pts

14Knox County, MEME41,117+1.3%−7.9 pts

15Washington County, MEME31,334+0.8%+4.6 pts

16Aroostook County, MEME66,609-0.7%+14.2 pts

SHOWING 1–16 OF 16

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU POPULATION ESTIMATES