RANKING · 2000 CENSUS · 16 SHOWN OF 16

Oldest by median age, Maine counties · 2000

Maine counties ranked by median age of residents (2000 ACS). This list covers the 16 counties in Maine that qualify, ranked against each other statewide. The median across all 16 is 39.3.

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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 1990

01Lincoln County, MEME36,59542.6+14%

02Piscataquis County, MEME17,40942.1+19%

03Knox County, MEME41,11741.4+12%

04Aroostook County, MEME66,60940.7+23%

05Hancock County, MEME57,17140.7+14%

06Washington County, MEME31,33440.5+14%

07Oxford County, MEME60,34640.2+15%

08Waldo County, MEME40,69339.3+13%

09Somerset County, MEME51,62038.9+15%

10Kennebec County, MEME129,06738.7+13%

11York County, MEME222,43438.5+14%

12Franklin County, MEME30,82438.2+16%

13Sagadahoc County, MEME37,97938.0+16%

14Cumberland County, MEME317,22237.6+12%

15Androscoggin County, MEME116,48737.2+13%

16Penobscot County, MEME157,96737.2+14%

SHOWING 1–16 OF 16

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS