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.
Uses the US age of majority. Not comparable with population_0_14_share, which stops at 14.
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.
Rankings
- US states
- US counties
- Counties in Texas
- Counties in Georgia
- Counties in Virginia
- Counties in Kentucky
- Counties in Missouri
- Counties in Kansas
- Counties in Illinois
- Counties in North Carolina
- Counties in Iowa
- Counties in Tennessee
US states by population under 18, 2025
Places with data
Countries
Regions and states
- California
- Texas
- Florida
- New York
- Pennsylvania
- Illinois
- Ohio
- Georgia
- North Carolina
- Michigan
- Kentucky
- Kansas
- Maine
- Louisiana
- West Virginia
- Massachusetts
Provinces and counties
- Los Angeles County
- Cook County
- Harris County
- Maricopa County
- San Diego County
- Orange County
- Miami-Dade County
- Dallas County
- Kings County
- Riverside County
- Douglas County
- Lancaster County
- Guilford County
- Merced County
- Sacramento County
- Howard County
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:
Which places have the highest population under 18? Use official data and cite it.
rank_places {"indicator":"population_0_17_share","level":"region","within":"United States"}
GET https://invokely.ai/api/v1/rank?indicator=population_0_17_share&level=region&within=United%20States