RANKING · 2010 CENSUS · 16 SHOWN OF 16

Most population gained, Maine counties · 2010

Maine counties that added the most residents from the 2000 census to 2010, 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+16,062−29%

02York County, MEME222,434+10,389−53%

03Penobscot County, MEME157,967+9,004−635%

04Kennebec County, MEME129,067+5,037+316%

05Androscoggin County, MEME116,487+3,909−367%

06Oxford County, MEME60,346+3,078+43%

07Hancock County, MEME57,171+2,627−46%

08Waldo County, MEME40,693+2,506−23%

09Somerset County, MEME51,620+1,340+20%

10Franklin County, MEME30,824+1,301+183%

11Lincoln County, MEME36,595+841−74%

12Piscataquis County, MEME17,409+300−121%

13Knox County, MEME41,117+118−96%

14Sagadahoc County, MEME37,979+79−95%

15Washington County, MEME31,334-1,085−21%

16Aroostook County, MEME66,609-2,068−84%

SHOWING 1–16 OF 16

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