RANKING · 2025 ESTIMATES · 16 SHOWN OF 16

Most densely populated, Maine counties

Maine counties ranked by residents per square mile (2025). This list covers the 16 counties in Maine that qualify, ranked against each other statewide.

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

RANKPLACESTATEPOPPOPULATION DENSITYVS –

01Cumberland County, MEME317,222379–

02Androscoggin County, MEME116,487249–

03York County, MEME222,434224–

04Sagadahoc County, MEME37,979150–

05Kennebec County, MEME129,067149–

06Knox County, MEME41,117113–

07Lincoln County, MEME36,59580–

08Waldo County, MEME40,69356–

09Penobscot County, MEME157,96746–

10Hancock County, MEME57,17136–

11Oxford County, MEME60,34629–

12Franklin County, MEME30,82418–

13Somerset County, MEME51,62013–

14Washington County, MEME31,33412–

15Aroostook County, MEME66,60910–

16Piscataquis County, MEME17,4094–

SHOWING 1–16 OF 16

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