RANKING · 2020 CENSUS · 16 SHOWN OF 16

Most densely populated, Maine counties · 2020

Maine counties ranked by residents per square mile (2023). This list covers the 16 counties in Maine that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most sparsely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Cumberland County, MEME317,222362+14%

02Androscoggin County, MEME116,487237+7%

03York County, MEME222,434214+14%

04Sagadahoc County, MEME37,979144+4%

05Kennebec County, MEME129,067143+6%

06Knox County, MEME41,117111+2%

07Lincoln County, MEME36,59577+5%

08Waldo County, MEME40,69354+9%

09Penobscot County, MEME157,96745+5%

10Hancock County, MEME57,17135+7%

11Oxford County, MEME60,34628+6%

12Franklin County, MEME30,82417−0%

13Somerset County, MEME51,62013−1%

14Washington County, MEME31,33412−8%

15Aroostook County, MEME66,60910−9%

16Piscataquis County, MEME17,4094−3%

SHOWING 1–16 OF 16

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES