Counties in Oregon by population under 18, 2025
Morrow County had the highest population under 18 of 36 counties in 2025, at 25.6%. Wheeler County had the lowest, at 13.4%. The median was 19.6% and the figure for Oregon was 19%. Source: the U.S. Census Bureau.
All counties, 2025
Full ranking
| Rank | Counties | 2025 (%) | Change on 2024 |
|---|---|---|---|
| 1 | Morrow County | 25.6 | -0.3 pts |
| 2 | Malheur County | 24.5 | -0.1 pts |
| 3 | Umatilla County | 23.3 | -0.5 pts |
| 4 | Marion County | 22.4 | -0.3 pts |
| 5 | Sherman County | 22 | -0.4 pts |
| 6 | Jefferson County | 21.4 | -0.2 pts |
| 7 | Union County | 21.3 | -0.2 pts |
| 8 | Linn County | 21.2 | -0.3 pts |
| 9 | Klamath County | 20.8 | -0.2 pts |
| 10 | Wasco County | 20.8 | 0 pts |
| 11 | Polk County | 20.6 | -0.3 pts |
| 12 | Harney County | 20.3 | -0.4 pts |
| 13 | Washington County | 20.3 | -0.4 pts |
| 14 | Hood River County | 20.1 | -0.5 pts |
| 15 | Clackamas County | 20.1 | -0.3 pts |
| 16 | Columbia County | 20 | -0.1 pts |
| 17 | Yamhill County | 19.7 | -0.5 pts |
| 18 | Crook County | 19.6 | -0 pts |
| 19 | Jackson County | 19.5 | -0.3 pts |
| 20 | Lake County | 18.9 | -0.5 pts |
| 21 | Wallowa County | 18.9 | +0.3 pts |
| 22 | Gilliam County | 18.8 | -0.4 pts |
| 23 | Douglas County | 18.6 | -0.2 pts |
| 24 | Baker County | 18.6 | -0.5 pts |
| 25 | Josephine County | 18.3 | -0.2 pts |
| 26 | Deschutes County | 18.2 | -0.3 pts |
| 27 | Grant County | 17.9 | -0.1 pts |
| 28 | Tillamook County | 16.9 | -0.5 pts |
| 29 | Lane County | 16.7 | -0.3 pts |
| 30 | Multnomah County | 16.7 | -0.3 pts |
| 31 | Coos County | 16.6 | -0.2 pts |
| 32 | Clatsop County | 16.6 | -0.7 pts |
| 33 | Lincoln County | 14.4 | -0.3 pts |
| 34 | Benton County | 14.4 | -0.4 pts |
| 35 | Curry County | 14 | +0.2 pts |
| 36 | Wheeler County | 13.4 | +0.5 pts |
Other periods
About this ranking
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.
Uses the US age of majority. Not comparable with population_0_14_share, which stops at 14.
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. 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.Use this data in your AI agent
Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:
Rank Counties in Oregon by population under 18 using official data, and cite the source.
rank_places {"indicator":"population_0_17_share","level":"province","within":"Oregon","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_0_17_share&level=province&within=Oregon&limit=10Questions
Which county has the highest population under 18?
Morrow County, with 25.6% in 2025, according to the U.S. Census Bureau.
Which county has the lowest population under 18?
Wheeler County, with 13.4% in 2025.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: 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. Retrieved 2026-10-12.