RANKING · 2020 CENSUS · 16 SHOWN OF 16

Oldest by median age, Maine counties · 2020

Maine counties ranked by median age of residents (2020 ACS). This list covers the 16 counties in Maine that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Lincoln County, MEME36,59552.2+23%

02Piscataquis County, MEME17,40952.0+24%

03Knox County, MEME41,11749.6+20%

04Hancock County, MEME57,17149.5+22%

05Washington County, MEME31,33449.4+22%

06Aroostook County, MEME66,60948.9+20%

07Oxford County, MEME60,34647.6+18%

08Sagadahoc County, MEME37,97947.4+25%

09Waldo County, MEME40,69347.3+20%

10Franklin County, MEME30,82446.9+23%

11Somerset County, MEME51,62046.9+21%

12York County, MEME222,43445.7+19%

13Kennebec County, MEME129,06744.9+16%

14Cumberland County, MEME317,22242.4+13%

15Penobscot County, MEME157,96742.0+13%

16Androscoggin County, MEME116,48741.2+11%

SHOWING 1–16 OF 16

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