RANKING · 2025 ESTIMATES · 16 SHOWN OF 16

Most population lost, Maine counties

Maine counties that lost the most residents from the 2020 census to 2025, by raw count of people rather than percentage. This list covers the 16 counties in Maine that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Aroostook County, MEME66,609-496−96%

02Washington County, MEME31,334+239−117%

03Knox County, MEME41,117+510−85%

04Piscataquis County, MEME17,409+609−143%

05Waldo County, MEME40,693+1,086−67%

06Somerset County, MEME51,620+1,143+2%

07Sagadahoc County, MEME37,979+1,280−24%

08Lincoln County, MEME36,595+1,358−58%

09Franklin County, MEME30,824+1,368+198%

10Hancock County, MEME57,171+1,693−65%

11Oxford County, MEME60,346+2,569+19%

12Androscoggin County, MEME116,487+5,348−465%

13Kennebec County, MEME129,067+5,425+348%

14Penobscot County, MEME157,967+5,768−443%

15York County, MEME222,434+10,462−53%

16Cumberland County, MEME317,222+14,153−37%

SHOWING 1–16 OF 16

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