# Counties in Oregon by population under 18, 2025

All 36 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/oregon-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Morrow County | 25.6 |
| 2 | Malheur County | 24.5 |
| 3 | Umatilla County | 23.3 |
| 4 | Marion County | 22.4 |
| 5 | Sherman County | 22 |
| 6 | Jefferson County | 21.4 |
| 7 | Union County | 21.3 |
| 8 | Linn County | 21.2 |
| 9 | Klamath County | 20.8 |
| 10 | Wasco County | 20.8 |
| 11 | Polk County | 20.6 |
| 12 | Harney County | 20.3 |
| 13 | Washington County | 20.3 |
| 14 | Hood River County | 20.1 |
| 15 | Clackamas County | 20.1 |
| 16 | Columbia County | 20 |
| 17 | Yamhill County | 19.7 |
| 18 | Crook County | 19.6 |
| 19 | Jackson County | 19.5 |
| 20 | Lake County | 18.9 |
| 21 | Wallowa County | 18.9 |
| 22 | Gilliam County | 18.8 |
| 23 | Douglas County | 18.6 |
| 24 | Baker County | 18.6 |
| 25 | Josephine County | 18.3 |
| 26 | Deschutes County | 18.2 |
| 27 | Grant County | 17.9 |
| 28 | Tillamook County | 16.9 |
| 29 | Lane County | 16.7 |
| 30 | Multnomah County | 16.7 |
| 31 | Coos County | 16.6 |
| 32 | Clatsop County | 16.6 |
| 33 | Lincoln County | 14.4 |
| 34 | Benton County | 14.4 |
| 35 | Curry County | 14 |
| 36 | Wheeler County | 13.4 |