Data / Rankings / Population under 18 / Counties in Alaska

Counties in Alaska by population under 18

Kusilvak Census Area had the highest population under 18 of 30 counties in 2020, at 41.7%. Aleutians East Borough had the lowest, at 8.7%. The median was 22.8% and the figure for Alaska was 24.6%. Source: the U.S. Census Bureau.

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Highest41.7Kusilvak Census Area
Lowest8.7Aleutians East Borough
Median22.830 counties
Alaska24.6History

Map of counties, 2020

Aleutians East Borough: 8.7 %Aleutians West Census Area: 12.5 %Anchorage Municipality: 23.7 %Bethel Census Area: 35.6 %Bristol Bay Borough: 21 %Chugach Census Area: 22.7 %Copper River Census Area: 22.9 %Denali Borough: 18.6 %Dillingham Census Area: 31.4 %Fairbanks North Star Borough: 24 %Haines Borough: 18.6 %Hoonah-Angoon Census Area: 21.6 %Juneau City and Borough: 21.2 %Kenai Peninsula Borough: 21.9 %Ketchikan Gateway Borough: 22.1 %Kodiak Island Borough: 24.6 %Kusilvak Census Area: 41.7 %Lake and Peninsula Borough: 30.4 %Matanuska-Susitna Borough: 27 %Nome Census Area: 32.8 %North Slope Borough: 25.8 %Northwest Arctic Borough: 35.6 %Petersburg Borough: 21 %Prince of Wales-Hyder Census Area: 23.3 %Sitka City and Borough: 20.7 %Skagway Municipality: 17.7 %Southeast Fairbanks Census Area: 24.6 %Wrangell City and Borough: 19.1 %Yakutat City and Borough: 18.2 %Yukon-Koyukuk Census Area: 26.1 %
  • Under 19
  • 19 to 21
  • 21 to 23
  • 23 to 25
  • 25 to 31
  • 31 and over
%, 2020. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2020

Kusilvak Census Area: 41.7 %Kusilvak Census Area41.7Bethel Census Area: 35.6 %Bethel Census Area35.6Northwest Arctic Borough: 35.6 %Northwest Arctic Borough35.6Nome Census Area: 32.8 %Nome Census Area32.8Dillingham Census Area: 31.4 %Dillingham Census Area31.4Lake and Peninsula Borough: 30.4 %Lake and Peninsula Borough30.4Matanuska-Susitna Borough: 27 %Matanuska-Susitna Borough27Yukon-Koyukuk Census Area: 26.1 %Yukon-Koyukuk Census Area26.1North Slope Borough: 25.8 %North Slope Borough25.8Kodiak Island Borough: 24.6 %Kodiak Island Borough24.6Southeast Fairbanks Census Area: 24.6 %Southeast Fairbanks Census Area24.6Fairbanks North Star Borough: 24 %Fairbanks North Star Borough24Anchorage Municipality: 23.7 %Anchorage Municipality23.7Prince of Wales-Hyder Census Area: 23.3 %Prince of Wales-Hyder Census Area23.3Copper River Census Area: 22.9 %Copper River Census Area22.9Chugach Census Area: 22.7 %Chugach Census Area22.7Ketchikan Gateway Borough: 22.1 %Ketchikan Gateway Borough22.1Kenai Peninsula Borough: 21.9 %Kenai Peninsula Borough21.9Hoonah-Angoon Census Area: 21.6 %Hoonah-Angoon Census Area21.6Juneau City and Borough: 21.2 %Juneau City and Borough21.2Bristol Bay Borough: 21 %Bristol Bay Borough21Petersburg Borough: 21 %Petersburg Borough21Sitka City and Borough: 20.7 %Sitka City and Borough20.7Wrangell City and Borough: 19.1 %Wrangell City and Borough19.1Denali Borough: 18.6 %Denali Borough18.6Haines Borough: 18.6 %Haines Borough18.6Yakutat City and Borough: 18.2 %Yakutat City and Borough18.2Skagway Municipality: 17.7 %Skagway Municipality17.7Aleutians West Census Area: 12.5 %Aleutians West Census Area12.5Aleutians East Borough: 8.7 %Aleutians East Borough8.7Kusilvak Census Area: 41.7 %Kusilvak Census Area41.7Bethel Census Area: 35.6 %Bethel Census Area35.6Northwest Arctic Borough: 35.6 %Northwest Arctic Borough35.6Nome Census Area: 32.8 %Nome Census Area32.8Dillingham Census Area: 31.4 %Dillingham Census Area31.4Lake and Peninsula Borough: 30.4 %Lake and Peninsula Borough30.4Matanuska-Susitna Borough: 27 %Matanuska-Susitna Borough27Yukon-Koyukuk Census Area: 26.1 %Yukon-Koyukuk Census Area26.1North Slope Borough: 25.8 %North Slope Borough25.8Kodiak Island Borough: 24.6 %Kodiak Island Borough24.6Southeast Fairbanks Census Area: 24.6 %Southeast Fairbanks Census Area24.6Fairbanks North Star Borough: 24 %Fairbanks North Star Borough24Anchorage Municipality: 23.7 %Anchorage Municipality23.7Prince of Wales-Hyder Census Area: 23.3 %Prince of Wales-Hyder Census Area23.3Copper River Census Area: 22.9 %Copper River Census Area22.9Chugach Census Area: 22.7 %Chugach Census Area22.7Ketchikan Gateway Borough: 22.1 %Ketchikan Gateway Borough22.1Kenai Peninsula Borough: 21.9 %Kenai Peninsula Borough21.9Hoonah-Angoon Census Area: 21.6 %Hoonah-Angoon Census Area21.6Juneau City and Borough: 21.2 %Juneau City and Borough21.2Bristol Bay Borough: 21 %Bristol Bay Borough21Petersburg Borough: 21 %Petersburg Borough21Sitka City and Borough: 20.7 %Sitka City and Borough20.7Wrangell City and Borough: 19.1 %Wrangell City and Borough19.1Denali Borough: 18.6 %Denali Borough18.6Haines Borough: 18.6 %Haines Borough18.6Yakutat City and Borough: 18.2 %Yakutat City and Borough18.2Skagway Municipality: 17.7 %Skagway Municipality17.7Aleutians West Census Area: 12.5 %Aleutians West Census Area12.5Aleutians East Borough: 8.7 %Aleutians East Borough8.7
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2020 (%)Change on 2019
1Kusilvak Census Area41.7+1 pts
2Bethel Census Area35.6+0.1 pts
3Northwest Arctic Borough35.6-0.1 pts
4Nome Census Area32.8-0.2 pts
5Dillingham Census Area31.4+0.1 pts
6Lake and Peninsula Borough30.4+1.9 pts
7Matanuska-Susitna Borough27-0.1 pts
8Yukon-Koyukuk Census Area26.1-0 pts
9North Slope Borough25.8-0.1 pts
10Kodiak Island Borough24.6-0.2 pts
11Southeast Fairbanks Census Area24.6+1.6 pts
12Fairbanks North Star Borough240 pts
13Anchorage Municipality23.7-0.1 pts
14Prince of Wales-Hyder Census Area23.3-0.7 pts
15Copper River Census Area22.9+0.1 pts
16Chugach Census Area22.7-0.1 pts
17Ketchikan Gateway Borough22.1-0.3 pts
18Kenai Peninsula Borough21.90 pts
19Hoonah-Angoon Census Area21.6+0.4 pts
20Juneau City and Borough21.2-0.2 pts
21Bristol Bay Borough21-0.7 pts
22Petersburg Borough21+0.7 pts
23Sitka City and Borough20.7+0.2 pts
24Wrangell City and Borough19.10 pts
25Denali Borough18.6-3.5 pts
26Haines Borough18.6-0.3 pts
27Yakutat City and Borough18.2-0.3 pts
28Skagway Municipality17.7-2.6 pts
29Aleutians West Census Area12.5+0.5 pts
30Aleutians East Borough8.7+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, 2020) [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, 2020. 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?period=2020. 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, 2020. 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?period=2020.

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, 2020 [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?period=2020 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_alaska_by_2020,
  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, 2020}},
  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?period=2020. 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, 2020
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?period=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/alaska-counties?period=2020.
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 41.7% in 2020, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Aleutians East Borough, with 8.7% in 2020.

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

Counties in Alaska: more rankings