RANKING · 2020 CENSUS · 16 SHOWN OF 16

Most population gained, Maine counties · 2020

Maine counties that added 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

01Cumberland County, MEME317,222+21,395−5%

02York County, MEME222,434+14,841−33%

03Androscoggin County, MEME116,487+3,437−334%

04Kennebec County, MEME129,067+1,491+23%

05Sagadahoc County, MEME37,979+1,406−16%

06Hancock County, MEME57,171+1,060−78%

07Knox County, MEME41,117+871−74%

08Waldo County, MEME40,693+821−75%

09Lincoln County, MEME36,595+780−76%

10Oxford County, MEME60,346-56−103%

11Piscataquis County, MEME17,409-735−48%

12Franklin County, MEME30,824-1,312−386%

13Penobscot County, MEME157,967-1,724+2%

14Somerset County, MEME51,620-1,751−256%

15Washington County, MEME31,334-1,761+29%

16Aroostook County, MEME66,609-4,765−63%

SHOWING 1–16 OF 16

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