RANKING · 2025 ESTIMATES · 16 SHOWN OF 16

Fastest growing, Maine counties

Maine counties ranked by population growth from the 2020 census to 2025. This list covers the 16 counties in Maine that qualify, ranked against each other statewide.

Flip the list · Fastest shrinking, US counties →

MaineAll states All rankings

SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01York County, MEME222,434+4.9%−63%

02Androscoggin County, MEME116,487+4.8%−446%

03Cumberland County, MEME317,222+4.7%−49%

04Franklin County, MEME30,824+4.6%+194%

05Oxford County, MEME60,346+4.4%+9%

06Kennebec County, MEME129,067+4.4%+320%

07Lincoln County, MEME36,595+3.9%−64%

08Penobscot County, MEME157,967+3.8%−430%

09Piscataquis County, MEME17,409+3.6%−148%

10Sagadahoc County, MEME37,979+3.5%−30%

11Hancock County, MEME57,171+3.1%−70%

12Waldo County, MEME40,693+2.7%−72%

13Somerset County, MEME51,620+2.3%+1%

14Knox County, MEME41,117+1.3%−86%

15Washington County, MEME31,334+0.8%−120%

16Aroostook County, MEME66,609-0.7%−95%

SHOWING 1–16 OF 16

Download CSV (full list, 16 rows)

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