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. The median across all 16 is 47.4.

Flip the list · Youngest by median age, US counties →

MaineAll states All rankings

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

Download CSV (full list, 16 rows)

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