Counties in Alaska by population under 18, 2025

Kusilvak Census Area had the highest population under 18 of 30 counties in 2025, at 41.4%. Aleutians East Borough had the lowest, at 6.6%. The median was 21.8% and the figure for Alaska was 23.3%. Source: the U.S. Census Bureau.

Highest41.4Kusilvak Census Area

Lowest6.6Aleutians East Borough

Median21.830 counties

Alaska23.3History

All counties, 2025

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

Full ranking

Rank	Counties	2025 (%)	Change on 2024
1	Kusilvak Census Area	41.4	-0.1 pts
2	Northwest Arctic Borough	36.7	+1 pts
3	Bethel Census Area	35.2	-0.2 pts
4	Nome Census Area	31.9	-0.5 pts
5	Dillingham Census Area	29.6	-0.6 pts
6	Lake and Peninsula Borough	27.6	-0.5 pts
7	Matanuska-Susitna Borough	25.3	-0.5 pts
8	Yukon-Koyukuk Census Area	25.2	-0.4 pts
9	Southeast Fairbanks Census Area	25	-0 pts
10	North Slope Borough	23	-0.4 pts
11	Kodiak Island Borough	22.9	-0.5 pts
12	Prince of Wales-Hyder Census Area	22.6	-0.4 pts
13	Fairbanks North Star Borough	22.6	-0.5 pts
14	Anchorage Municipality	22.5	-0.2 pts
15	Copper River Census Area	22	-0.6 pts
16	Chugach Census Area	21.6	-0.3 pts
17	Kenai Peninsula Borough	21.3	-0.1 pts
18	Ketchikan Gateway Borough	20	-0.4 pts
19	Petersburg Borough	19.6	-0.3 pts
20	Juneau City and Borough	19.5	-0.5 pts
21	Denali Borough	19.4	-0.1 pts
22	Hoonah-Angoon Census Area	19.3	-0.5 pts
23	Bristol Bay Borough	19.1	-0.9 pts
24	Wrangell City and Borough	18.7	-0.1 pts
25	Sitka City and Borough	18.6	-0.4 pts
26	Haines Borough	17.4	-0.9 pts
27	Yakutat City and Borough	17	-0.2 pts
28	Skagway Municipality	14.2	-2.1 pts
29	Aleutians West Census Area	8.6	-0.7 pts
30	Aleutians East Borough	6.6	-0.2 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.

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 (Counties in Alaska by population under 18, 2025) [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, Counties in Alaska by population under 18, 2025. 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/alaska-counties. 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. Counties in Alaska by population under 18, 2025. 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/alaska-counties.

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, Counties in Alaska by population under 18, 2025 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/alaska-counties (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_alaska_by_2025,
  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: Counties in Alaska by population under 18, 2025}},
  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/alaska-counties. 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: Counties in Alaska by population under 18, 2025
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/alaska-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/alaska-counties.
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  -

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Questions

Which county has the highest population under 18?

Kusilvak Census Area, with 41.4% in 2025, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Aleutians East Borough, with 6.6% 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.