US states by population under 18, 2025

Utah had the highest population under 18 of 51 states in 2025, at 26.1%. Vermont had the lowest, at 17%. The median was 20.9% and the figure for the United States was 21.1%. Source: the U.S. Census Bureau.

Highest26.1Utah

Lowest17Vermont

Median20.951 states

United States21.1History

All states, 2025

%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

Rank	States	2025 (%)	Change on 2024
1	Utah	26.1	-0.6 pts
2	Texas	24	-0.3 pts
3	Nebraska	23.7	-0.3 pts
4	South Dakota	23.5	-0.3 pts
5	Alaska	23.3	-0.3 pts
6	Idaho	23.3	-0.4 pts
7	Oklahoma	23.2	-0.3 pts
8	Kansas	22.9	-0.3 pts
9	North Dakota	22.9	-0.1 pts
10	Louisiana	22.7	-0.3 pts
11	Indiana	22.6	-0.2 pts
12	Arkansas	22.4	-0.3 pts
13	Mississippi	22.3	-0.3 pts
14	Iowa	22.2	-0.2 pts
15	Georgia	22.2	-0.3 pts
16	Kentucky	22.1	-0.2 pts
17	Minnesota	22	-0.3 pts
18	Missouri	21.7	-0.2 pts
19	Wyoming	21.6	-0.4 pts
20	Tennessee	21.5	-0.2 pts
21	Alabama	21.5	-0.2 pts
22	Maryland	21.3	-0.2 pts
23	Ohio	21.3	-0.2 pts
24	North Carolina	21.1	-0.2 pts
25	Arizona	21	-0.4 pts
26	Virginia	20.9	-0.3 pts
27	New Jersey	20.9	-0.2 pts
28	California	20.8	-0.3 pts
29	New Mexico	20.7	-0.4 pts
30	Nevada	20.7	-0.4 pts
31	South Carolina	20.6	-0.3 pts
32	Illinois	20.6	-0.3 pts
33	Wisconsin	20.5	-0.3 pts
34	Washington	20.4	-0.3 pts
35	Michigan	20.4	-0.3 pts
36	Colorado	20.3	-0.2 pts
37	Montana	20.2	-0.3 pts
38	Delaware	19.8	-0.3 pts
39	Pennsylvania	19.7	-0.2 pts
40	Hawaii	19.7	-0.2 pts
41	New York	19.5	-0.2 pts
42	West Virginia	19.5	-0.2 pts
43	Connecticut	19.5	-0.2 pts
44	Oregon	19	-0.3 pts
45	Florida	18.9	-0.2 pts
46	Massachusetts	18.6	-0.2 pts
47	District of Columbia	17.9	-0.1 pts
48	Rhode Island	17.7	-0.3 pts
49	New Hampshire	17.3	-0.3 pts
50	Maine	17.3	-0.3 pts
51	Vermont	17	-0.3 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 states 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

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Rank US states by population under 18 using official data, and cite the source.

rank_places {"indicator":"population_0_17_share","level":"region","within":"United States","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_0_17_share&level=region&within=United%20States&limit=10

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Questions

Which state has the highest population under 18?

Utah, with 26.1% in 2025, according to the U.S. Census Bureau.

Which state has the lowest population under 18?

Vermont, with 17% 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.