RANKING · 2024 ACS · 16 SHOWN OF 16

Oldest by median age, Maine counties

Maine counties ranked by median age of residents (2024 ACS). This list covers the 16 counties in Maine that qualify, ranked against each other statewide. The median across all 16 is 47.4.

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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

01▲1Piscataquis County, MEME17,40951.5+22%

02▼1Lincoln County, MEME36,59551.4+21%

03Knox County, MEME41,11749.5+20%

04Hancock County, MEME57,17149.0+20%

05Washington County, MEME31,33448.6+20%

06Aroostook County, MEME66,60948.3+19%

07Oxford County, MEME60,34648.2+20%

08▲1Waldo County, MEME40,69347.4+21%

09▼1Sagadahoc County, MEME37,97947.3+24%

10▲1Somerset County, MEME51,62047.0+21%

11▼1Franklin County, MEME30,82446.1+21%

12York County, MEME222,43445.3+18%

13Kennebec County, MEME129,06743.7+13%

14▲1Penobscot County, MEME157,96742.5+14%

15▼1Cumberland County, MEME317,22242.2+12%

16Androscoggin County, MEME116,48740.5+9%

SHOWING 1–16 OF 16

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES