# Counties in Maine by median age, 2024

All 16 values come from U.S. Census Bureau for 2024, so the places are comparable.

- Indicator id: `median_age`
- Unit: years
- Definition: 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.
- Source: 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/2024/table-based-SF/data/5YRData/acsdt5y2024-b01002.dat)
- Retrieved: 2026-10-08
- Citation: 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/2024/table-based-SF/data/5YRData/acsdt5y2024-b01002.dat. Retrieved 2026-10-08.
- Web page: https://invokely.ai/rankings/median-age/maine-counties
- CSV: https://invokely.ai/download/rankings/median-age/maine-counties.csv

| Rank | Place | years |
|---:|---|---:|
| 1 | Piscataquis County | 51.5 |
| 2 | Lincoln County | 51.4 |
| 3 | Knox County | 49.5 |
| 4 | Hancock County | 49 |
| 5 | Washington County | 48.6 |
| 6 | Aroostook County | 48.3 |
| 7 | Oxford County | 48.2 |
| 8 | Waldo County | 47.4 |
| 9 | Sagadahoc County | 47.3 |
| 10 | Somerset County | 47 |
| 11 | Franklin County | 46.1 |
| 12 | York County | 45.3 |
| 13 | Kennebec County | 43.7 |
| 14 | Penobscot County | 42.5 |
| 15 | Cumberland County | 42.2 |
| 16 | Androscoggin County | 40.5 |