RANKING · 2020 CENSUS · 16 SHOWN OF 16

Most population lost, Maine counties · 2020

Maine counties that lost the most residents from the 2010 census to 2020, 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, MEME66,609-4,765−63%

02Washington County, MEME31,334-1,761+29%

03Somerset County, MEME51,620-1,751−256%

04Penobscot County, MEME157,967-1,724+2%

05Franklin County, MEME30,824-1,312−386%

06Piscataquis County, MEME17,409-735−48%

07Oxford County, MEME60,346-56−103%

08Lincoln County, MEME36,595+780−76%

09Waldo County, MEME40,693+821−75%

10Knox County, MEME41,117+871−74%

11Hancock County, MEME57,171+1,060−78%

12Sagadahoc County, MEME37,979+1,406−16%

13Kennebec County, MEME129,067+1,491+23%

14Androscoggin County, MEME116,487+3,437−334%

15York County, MEME222,434+14,841−33%

16Cumberland County, MEME317,222+21,395−5%

SHOWING 1–16 OF 16

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS