RANKING · 2025 ESTIMATES · 16 SHOWN OF 16

Fastest shrinking, Maine counties

Maine counties with the steepest population decline from the 2020 census to 2025. 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 growing Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Aroostook County, MEME66,609-0.7%−95%

02Washington County, MEME31,334+0.8%−120%

03Knox County, MEME41,117+1.3%−86%

04Somerset County, MEME51,620+2.3%+1%

05Waldo County, MEME40,693+2.7%−72%

06Hancock County, MEME57,171+3.1%−70%

07Sagadahoc County, MEME37,979+3.5%−30%

08Piscataquis County, MEME17,409+3.6%−148%

09Penobscot County, MEME157,967+3.8%−430%

10Lincoln County, MEME36,595+3.9%−64%

11Kennebec County, MEME129,067+4.4%+320%

12Oxford County, MEME60,346+4.4%+9%

13Franklin County, MEME30,824+4.6%+194%

14Cumberland County, MEME317,222+4.7%−49%

15Androscoggin County, MEME116,487+4.8%−446%

16York County, MEME222,434+4.9%−63%

SHOWING 1–16 OF 16

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES