Data / Rankings / Median age / Counties in Maine

Counties in Maine by median age

Lincoln County had the highest median age of 16 counties in 2021, at 51.3 years. Androscoggin County had the lowest, at 40.7 years. The median was 46.8 years and the figure for Maine was 44.7 years. Source: the U.S. Census Bureau.

Highest51.3Lincoln County
Lowest40.7Androscoggin County
Median46.816 counties
Maine44.7History

All counties, 2021

CSVChart (SVG)

Lincoln CountyLincoln County: 51.3 years51.3Piscataquis CountyPiscataquis County: 51.3 years51.3Hancock CountyHancock County: 49.2 years49.2Knox CountyKnox County: 48.7 years48.7Washington CountyWashington County: 48.4 years48.4Aroostook CountyAroostook County: 47.9 years47.9Oxford CountyOxford County: 47.6 years47.6Somerset CountySomerset County: 46.9 years46.9Sagadahoc CountySagadahoc County: 46.8 years46.8Waldo CountyWaldo County: 46.5 years46.5Franklin CountyFranklin County: 46.3 years46.3York CountyYork County: 45.4 years45.4Kennebec CountyKennebec County: 44.1 years44.1Penobscot CountyPenobscot County: 42.1 years42.1Cumberland CountyCumberland County: 41.9 years41.9Androscoggin CountyAndroscoggin County: 40.7 years40.7
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2021
years
1Lincoln County51.3
1Piscataquis County51.3
3Hancock County49.2
4Knox County48.7
5Washington County48.4
6Aroostook County47.9
7Oxford County47.6
8Somerset County46.9
9Sagadahoc County46.8
10Waldo County46.5
11Franklin County46.3
12York County45.4
13Kennebec County44.1
14Penobscot County42.1
15Cumberland County41.9
16Androscoggin County40.7

Other periods

About this ranking

Age that divides the resident population into two halves of equal size. Spain and the EU: on 1 January. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B01002: median age, total population. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b01002.dat. Retrieved 2026-10-08.

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Questions

Which county has the highest median age?

Lincoln County, with 51.3 years in 2021, according to the U.S. Census Bureau.

Which county has the lowest median age?

Androscoggin County, with 40.7 years in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B01002: median age, total population. Retrieved 2026-10-08.

Median age: other rankings

Counties in Maine: more rankings