Data / Rankings / Population under 18 / US states

US states by population under 18

Utah had the highest population under 18 of 51 states in 2015, at 30.7%. District of Columbia had the lowest, at 16.8%. The median was 22.9% and the figure for the United States was 22.9%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest30.7Utah
Lowest16.8District of Columbia
Median22.951 states
United States22.9History

Map of states, 2015

Alabama: 22.7 %Alaska: 25.2 %Arizona: 24 %Arkansas: 23.8 %California: 23.3 %Colorado: 23.2 %Connecticut: 21.3 %Delaware: 21.7 %District of Columbia: 16.8 %Florida: 20.3 %Georgia: 24.5 %Hawaii: 21.4 %Idaho: 26.5 %Illinois: 23 %Indiana: 24 %Iowa: 23.5 %Kansas: 24.9 %Kentucky: 23 %Louisiana: 23.9 %Maine: 19.3 %Maryland: 22.5 %Massachusetts: 20.4 %Michigan: 22.3 %Minnesota: 23.5 %Mississippi: 24.1 %Missouri: 22.9 %Montana: 22.1 %Nebraska: 25 %Nevada: 23.3 %New Hampshire: 19.8 %New Jersey: 22.3 %New Mexico: 23.9 %New York: 21.1 %North Carolina: 22.9 %North Dakota: 23 %Ohio: 22.6 %Oklahoma: 24.6 %Oregon: 21.6 %Pennsylvania: 21 %Rhode Island: 19.9 %South Carolina: 22.4 %South Dakota: 24.8 %Tennessee: 22.8 %Texas: 26.1 %Utah: 30.7 %Vermont: 19.3 %Virginia: 22.4 %Washington: 22.6 %West Virginia: 20.6 %Wisconsin: 22.5 %Wyoming: 24.1 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 and over
%, 2015. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All states, 2015

Utah: 30.7 %Utah30.7Idaho: 26.5 %Idaho26.5Texas: 26.1 %Texas26.1Alaska: 25.2 %Alaska25.2Nebraska: 25 %Nebraska25Kansas: 24.9 %Kansas24.9South Dakota: 24.8 %South Dakota24.8Oklahoma: 24.6 %Oklahoma24.6Georgia: 24.5 %Georgia24.5Mississippi: 24.1 %Mississippi24.1Wyoming: 24.1 %Wyoming24.1Indiana: 24 %Indiana24Arizona: 24 %Arizona24New Mexico: 23.9 %New Mexico23.9Louisiana: 23.9 %Louisiana23.9Arkansas: 23.8 %Arkansas23.8Iowa: 23.5 %Iowa23.5Minnesota: 23.5 %Minnesota23.5Nevada: 23.3 %Nevada23.3California: 23.3 %California23.3Colorado: 23.2 %Colorado23.2Kentucky: 23 %Kentucky23North Dakota: 23 %North Dakota23Illinois: 23 %Illinois23Missouri: 22.9 %Missouri22.9North Carolina: 22.9 %North Carolina22.9Tennessee: 22.8 %Tennessee22.8Alabama: 22.7 %Alabama22.7Ohio: 22.6 %Ohio22.6Washington: 22.6 %Washington22.6Wisconsin: 22.5 %Wisconsin22.5Maryland: 22.5 %Maryland22.5Virginia: 22.4 %Virginia22.4South Carolina: 22.4 %South Carolina22.4Michigan: 22.3 %Michigan22.3New Jersey: 22.3 %New Jersey22.3Montana: 22.1 %Montana22.1Delaware: 21.7 %Delaware21.7Oregon: 21.6 %Oregon21.6Hawaii: 21.4 %Hawaii21.4Connecticut: 21.3 %Connecticut21.3New York: 21.1 %New York21.1Pennsylvania: 21 %Pennsylvania21West Virginia: 20.6 %West Virginia20.6Massachusetts: 20.4 %Massachusetts20.4Florida: 20.3 %Florida20.3Rhode Island: 19.9 %Rhode Island19.9New Hampshire: 19.8 %New Hampshire19.8Maine: 19.3 %Maine19.3Vermont: 19.3 %Vermont19.3District of Columbia: 16.8 %District of Columbia16.8Utah: 30.7 %Utah30.7Idaho: 26.5 %Idaho26.5Texas: 26.1 %Texas26.1Alaska: 25.2 %Alaska25.2Nebraska: 25 %Nebraska25Kansas: 24.9 %Kansas24.9South Dakota: 24.8 %South Dakota24.8Oklahoma: 24.6 %Oklahoma24.6Georgia: 24.5 %Georgia24.5Mississippi: 24.1 %Mississippi24.1Wyoming: 24.1 %Wyoming24.1Indiana: 24 %Indiana24Arizona: 24 %Arizona24New Mexico: 23.9 %New Mexico23.9Louisiana: 23.9 %Louisiana23.9Arkansas: 23.8 %Arkansas23.8Iowa: 23.5 %Iowa23.5Minnesota: 23.5 %Minnesota23.5Nevada: 23.3 %Nevada23.3California: 23.3 %California23.3Colorado: 23.2 %Colorado23.2Kentucky: 23 %Kentucky23North Dakota: 23 %North Dakota23Illinois: 23 %Illinois23Missouri: 22.9 %Missouri22.9North Carolina: 22.9 %North Carolina22.9Tennessee: 22.8 %Tennessee22.8Alabama: 22.7 %Alabama22.7Ohio: 22.6 %Ohio22.6Washington: 22.6 %Washington22.6Wisconsin: 22.5 %Wisconsin22.5Maryland: 22.5 %Maryland22.5Virginia: 22.4 %Virginia22.4South Carolina: 22.4 %South Carolina22.4Michigan: 22.3 %Michigan22.3New Jersey: 22.3 %New Jersey22.3Montana: 22.1 %Montana22.1Delaware: 21.7 %Delaware21.7Oregon: 21.6 %Oregon21.6Hawaii: 21.4 %Hawaii21.4Connecticut: 21.3 %Connecticut21.3New York: 21.1 %New York21.1Pennsylvania: 21 %Pennsylvania21West Virginia: 20.6 %West Virginia20.6Massachusetts: 20.4 %Massachusetts20.4Florida: 20.3 %Florida20.3Rhode Island: 19.9 %Rhode Island19.9New Hampshire: 19.8 %New Hampshire19.8Maine: 19.3 %Maine19.3Vermont: 19.3 %Vermont19.3District of Columbia: 16.8 %District of Columbia16.8
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankStates2015 (%)Change on 2014
1Utah30.7-0.2 pts
2Idaho26.5-0.1 pts
3Texas26.1-0.2 pts
4Alaska25.2-0.1 pts
5Nebraska250 pts
6Kansas24.9-0.1 pts
7South Dakota24.80 pts
8Oklahoma24.6-0 pts
9Georgia24.5-0.2 pts
10Mississippi24.1-0.2 pts
11Wyoming24.1+0.1 pts
12Indiana24-0.1 pts
13Arizona24-0.3 pts
14New Mexico23.9-0.2 pts
15Louisiana23.9-0.1 pts
16Arkansas23.8-0.1 pts
17Iowa23.5-0 pts
18Minnesota23.5-0.1 pts
19Nevada23.3-0.1 pts
20California23.3-0.3 pts
21Colorado23.2-0.2 pts
22Kentucky23-0.1 pts
23North Dakota23+0.2 pts
24Illinois23-0.2 pts
25Missouri22.9-0.1 pts
26North Carolina22.9-0.2 pts
27Tennessee22.8-0.1 pts
28Alabama22.7-0.1 pts
29Ohio22.6-0.1 pts
30Washington22.6-0.2 pts
31Wisconsin22.5-0.1 pts
32Maryland22.5-0.1 pts
33Virginia22.4-0.1 pts
34South Carolina22.4-0.1 pts
35Michigan22.3-0.2 pts
36New Jersey22.3-0.2 pts
37Montana22.1-0.1 pts
38Delaware21.7-0.2 pts
39Oregon21.6-0.2 pts
40Hawaii21.4-0.1 pts
41Connecticut21.3-0.2 pts
42New York21.1-0.2 pts
43Pennsylvania21-0.1 pts
44West Virginia20.6-0 pts
45Massachusetts20.4-0.2 pts
46Florida20.3-0.1 pts
47Rhode Island19.9-0.2 pts
48New Hampshire19.8-0.3 pts
49Maine19.3-0.2 pts
50Vermont19.3-0.2 pts
51District of Columbia16.80 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.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). 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 (US states by population under 18, 2015) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

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, US states by population under 18, 2015. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-under-18/us-states?period=2015. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. 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. US states by population under 18, 2015. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/population-under-18/us-states?period=2015.

Harvard

U.S. Census Bureau (2026) 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, US states by population under 18, 2015 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/us-states?period=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_us_states_by_population_2015,
  author = {{U.S. Census Bureau}},
  title = {{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: US states by population under 18, 2015}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/population-under-18/us-states?period=2015. Publisher attribution: 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.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - 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: US states by population under 18, 2015
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/population-under-18/us-states?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/us-states?period=2015.
N1  - Publisher attribution: 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.
ER  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

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 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

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which state has the highest population under 18?

Utah, with 30.7% in 2015, according to the U.S. Census Bureau.

Which state has the lowest population under 18?

District of Columbia, with 16.8% in 2015.

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.

Population under 18: other rankings

US states: more rankings