# Counties in Wyoming by population under 18, 2025

All 23 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population_0_17_share`
- Unit: %
- Definition: Residents aged 0 to 17 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 0 to 17 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 0 to 17 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-under-18/wyoming-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Campbell County | 25.9 |
| 2 | Uinta County | 25.2 |
| 3 | Crook County | 24.6 |
| 4 | Converse County | 24 |
| 5 | Sweetwater County | 23.8 |
| 6 | Lincoln County | 23.3 |
| 7 | Big Horn County | 23.3 |
| 8 | Fremont County | 22.7 |
| 9 | Natrona County | 22.6 |
| 10 | Laramie County | 21.5 |
| 11 | Carbon County | 21.3 |
| 12 | Sublette County | 21.1 |
| 13 | Sheridan County | 20.4 |
| 14 | Washakie County | 20.3 |
| 15 | Hot Springs County | 20.1 |
| 16 | Goshen County | 19.9 |
| 17 | Johnson County | 19.4 |
| 18 | Platte County | 19.3 |
| 19 | Park County | 19.3 |
| 20 | Weston County | 19 |
| 21 | Teton County | 16.6 |
| 22 | Niobrara County | 16.5 |
| 23 | Albany County | 15.4 |