# Counties in Utah by population aged 18 to 64, 2025

All 29 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population_18_64_share`
- Unit: %
- Definition: Residents aged 18 to 64 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.
- Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (https://www.census.gov/programs-surveys/popest/data/data-sets.html)
- Retrieved: 2026-10-12
- Citation: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/population-18-64/utah-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Salt Lake County | 63.8 |
| 2 | Cache County | 61.6 |
| 3 | Utah County | 61.4 |
| 4 | Weber County | 61.2 |
| 5 | Summit County | 60.2 |
| 6 | Tooele County | 60 |
| 7 | Davis County | 59.5 |
| 8 | Iron County | 59.4 |
| 9 | Grand County | 59.2 |
| 10 | Sanpete County | 58.5 |
| 11 | Wasatch County | 57.6 |
| 12 | Uintah County | 57.3 |
| 13 | Box Elder County | 57 |
| 14 | Morgan County | 56 |
| 15 | San Juan County | 56 |
| 16 | Carbon County | 55.5 |
| 17 | Duchesne County | 54.7 |
| 18 | Beaver County | 54.4 |
| 19 | Sevier County | 54.2 |
| 20 | Juab County | 53.8 |
| 21 | Washington County | 53.8 |
| 22 | Emery County | 52.9 |
| 23 | Millard County | 52.8 |
| 24 | Garfield County | 52.7 |
| 25 | Kane County | 51.8 |
| 26 | Wayne County | 51.3 |
| 27 | Rich County | 50.5 |
| 28 | Piute County | 49.8 |
| 29 | Daggett County | 48.8 |