# Population under 18 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. ## Key facts - Population under 18 in the United States was 21.1% in 2025, according to the U.S. Census Bureau. - Utah had the highest population under 18 of 51 states in 2025, at 26.1%, and Vermont the lowest, at 17%. Source: the U.S. Census Bureau. - Published for 3,196 places, with figures from 2010 to 2025. - Figures last updated on 2026-10-12. - Indicator id: `population_0_17_share` - Unit: % - Note: Uses the US age of majority. Not comparable with population_0_14_share, which stops at 14. - Web page: https://invokely.ai/en/population-under-18 - API: https://invokely.ai/api/v1/indicators/population_0_17_share ## Latest figures | Place | Period | % | Source | |---|---|---:|---| | United States | 2025 | 21.1 | 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. | ## Rankings - [US states](https://invokely.ai/rankings/population-under-18/us-states.md) (51 places) - [US counties](https://invokely.ai/rankings/population-under-18/us-counties.md) (3144 places) - [Counties in Texas](https://invokely.ai/rankings/population-under-18/texas-counties.md) (254 places) - [Counties in Georgia](https://invokely.ai/rankings/population-under-18/georgia-counties.md) (159 places) - [Counties in Virginia](https://invokely.ai/rankings/population-under-18/virginia-counties.md) (133 places) - [Counties in Kentucky](https://invokely.ai/rankings/population-under-18/kentucky-counties.md) (120 places) - [Counties in Missouri](https://invokely.ai/rankings/population-under-18/missouri-counties.md) (115 places) - [Counties in Kansas](https://invokely.ai/rankings/population-under-18/kansas-counties.md) (105 places) - [Counties in Illinois](https://invokely.ai/rankings/population-under-18/illinois-counties.md) (102 places) - [Counties in North Carolina](https://invokely.ai/rankings/population-under-18/north-carolina-counties.md) (100 places) - [Counties in Iowa](https://invokely.ai/rankings/population-under-18/iowa-counties.md) (99 places) - [Counties in Tennessee](https://invokely.ai/rankings/population-under-18/tennessee-counties.md) (95 places) - [Counties in Nebraska](https://invokely.ai/rankings/population-under-18/nebraska-counties.md) (93 places) - [Counties in Indiana](https://invokely.ai/rankings/population-under-18/indiana-counties.md) (92 places) - [Counties in Ohio](https://invokely.ai/rankings/population-under-18/ohio-counties.md) (88 places) - [Counties in Minnesota](https://invokely.ai/rankings/population-under-18/minnesota-counties.md) (87 places) - [Counties in Michigan](https://invokely.ai/rankings/population-under-18/michigan-counties.md) (83 places) - [Counties in Mississippi](https://invokely.ai/rankings/population-under-18/mississippi-counties.md) (82 places) - [Counties in Oklahoma](https://invokely.ai/rankings/population-under-18/oklahoma-counties.md) (77 places) - [Counties in Arkansas](https://invokely.ai/rankings/population-under-18/arkansas-counties.md) (75 places) - [Counties in Wisconsin](https://invokely.ai/rankings/population-under-18/wisconsin-counties.md) (72 places) - [Counties in Alabama](https://invokely.ai/rankings/population-under-18/alabama-counties.md) (67 places) - [Counties in Florida](https://invokely.ai/rankings/population-under-18/florida-counties.md) (67 places) - [Counties in Pennsylvania](https://invokely.ai/rankings/population-under-18/pennsylvania-counties.md) (67 places) - [Counties in South Dakota](https://invokely.ai/rankings/population-under-18/south-dakota-counties.md) (66 places) - [Counties in Colorado](https://invokely.ai/rankings/population-under-18/colorado-counties.md) (64 places) - [Counties in Louisiana](https://invokely.ai/rankings/population-under-18/louisiana-counties.md) (64 places) - [Counties in New York](https://invokely.ai/rankings/population-under-18/new-york-counties.md) (62 places) - [Counties in California](https://invokely.ai/rankings/population-under-18/california-counties.md) (58 places) - [Counties in Montana](https://invokely.ai/rankings/population-under-18/montana-counties.md) (56 places) - [Counties in West Virginia](https://invokely.ai/rankings/population-under-18/west-virginia-counties.md) (55 places) - [Counties in North Dakota](https://invokely.ai/rankings/population-under-18/north-dakota-counties.md) (53 places) - [Counties in South Carolina](https://invokely.ai/rankings/population-under-18/south-carolina-counties.md) (46 places) - [Counties in Idaho](https://invokely.ai/rankings/population-under-18/idaho-counties.md) (44 places) - [Counties in Washington](https://invokely.ai/rankings/population-under-18/washington-counties.md) (39 places) - [Counties in Oregon](https://invokely.ai/rankings/population-under-18/oregon-counties.md) (36 places) - [Counties in New Mexico](https://invokely.ai/rankings/population-under-18/new-mexico-counties.md) (33 places) - [Counties in Alaska](https://invokely.ai/rankings/population-under-18/alaska-counties.md) (30 places) - [Counties in Utah](https://invokely.ai/rankings/population-under-18/utah-counties.md) (29 places) - [Counties in Maryland](https://invokely.ai/rankings/population-under-18/maryland-counties.md) (24 places) - [Counties in Wyoming](https://invokely.ai/rankings/population-under-18/wyoming-counties.md) (23 places) - [Counties in New Jersey](https://invokely.ai/rankings/population-under-18/new-jersey-counties.md) (21 places) - [Counties in Nevada](https://invokely.ai/rankings/population-under-18/nevada-counties.md) (17 places) - [Counties in Maine](https://invokely.ai/rankings/population-under-18/maine-counties.md) (16 places) - [Counties in Arizona](https://invokely.ai/rankings/population-under-18/arizona-counties.md) (15 places) - [Counties in Massachusetts](https://invokely.ai/rankings/population-under-18/massachusetts-counties.md) (14 places) - [Counties in Vermont](https://invokely.ai/rankings/population-under-18/vermont-counties.md) (14 places) - [Counties in New Hampshire](https://invokely.ai/rankings/population-under-18/new-hampshire-counties.md) (10 places) - [Counties in Connecticut](https://invokely.ai/rankings/population-under-18/connecticut-counties.md) (9 places) - [Counties in Hawaii](https://invokely.ai/rankings/population-under-18/hawaii-counties.md) (5 places) - [Counties in Rhode Island](https://invokely.ai/rankings/population-under-18/rhode-island-counties.md) (5 places)