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. The median across all 16 is +3.8%. Biggest climber in the top 100 since 2020: Franklin County, ME, up 10 places to #4.

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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

01▲1York County, MEME222,434+4.9%−8.5 pts

02▲2Androscoggin County, MEME116,487+4.8%+6.2 pts

03▼2Cumberland County, MEME317,222+4.7%−4.6 pts

04▲10Franklin County, MEME30,824+4.6%+3.1 pts

05▲5Oxford County, MEME60,346+4.4%+0.4 pts

06▲3Kennebec County, MEME129,067+4.4%+3.3 pts

07▼2Lincoln County, MEME36,595+3.9%−6.9 pts

08▲3Penobscot County, MEME157,967+3.8%+4.9 pts

09▲4Piscataquis County, MEME17,409+3.6%+11.2 pts

10▼7Sagadahoc County, MEME37,979+3.5%−1.5 pts

11▼3Hancock County, MEME57,171+3.1%−7.3 pts

12▼5Waldo County, MEME40,693+2.7%−7.1 pts

13▼1Somerset County, MEME51,620+2.3%0.0 pts

14▼8Knox 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 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES