Data / Rankings / Population under 18 / US counties

US counties by population under 18

Kusilvak Census Area had the highest population under 18 of 3144 counties in 2022, at 41.6%. Sumter County had the lowest, at 7.2%. The median was 21.9% and the figure for the United States was 21.8%. Source: the U.S. Census Bureau.

Highest41.6Kusilvak Census Area
Lowest7.2Sumter County
Median21.93144 counties
United States21.8History

Top 40 counties, 2022

Kusilvak Census Area: 41.6 %Kusilvak Census Area41.6Loving County: 41.3 %Loving County41.3Todd County: 40.3 %Todd County40.3Buffalo County: 37.6 %Buffalo County37.6Oglala Lakota County: 36.8 %Oglala Lakota County36.8Jackson County: 36.1 %Jackson County36.1Northwest Arctic Borough: 35.9 %Northwest Arctic Borough35.9Thurston County: 35.6 %Thurston County35.6Dewey County: 35.4 %Dewey County35.4Corson County: 35.4 %Corson County35.4Bethel Census Area: 35.4 %Bethel Census Area35.4Gaines County: 35.2 %Gaines County35.2Sioux County: 35 %Sioux County35Benson County: 34.2 %Benson County34.2Juab County: 33.9 %Juab County33.9Rolette County: 33.9 %Rolette County33.9Morgan County: 33.7 %Morgan County33.7Adams County: 33.6 %Adams County33.6Hamlin County: 33 %Hamlin County33Jefferson County: 32.9 %Jefferson County32.9Nome Census Area: 32.6 %Nome Census Area32.6Ziebach County: 32.5 %Ziebach County32.5LaGrange County: 32.5 %LaGrange County32.5Roosevelt County: 32.3 %Roosevelt County32.3Mellette County: 32.2 %Mellette County32.2Tooele County: 32 %Tooele County32Menominee County: 31.8 %Menominee County31.8Big Horn County: 31.8 %Big Horn County31.8Duchesne County: 31.7 %Duchesne County31.7Uintah County: 31.6 %Uintah County31.6Utah County: 31.6 %Utah County31.6Adams County: 31.5 %Adams County31.5Dillingham Census Area: 31.4 %Dillingham Census Area31.4Long County: 31.3 %Long County31.3Dallam County: 31.2 %Dallam County31.2Bennett County: 31.2 %Bennett County31.2Zapata County: 31.2 %Zapata County31.2Franklin County: 30.9 %Franklin County30.9Yoakum County: 30.9 %Yoakum County30.9Andrews County: 30.8 %Andrews County30.8
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2022 (%)Change on 2021
1Kusilvak Census Area41.6-0.1 pts
2Loving County41.3-9.6 pts
3Todd County40.3-0.3 pts
4Buffalo County37.6-0.2 pts
5Oglala Lakota County36.8-0.6 pts
6Jackson County36.1+0.1 pts
7Northwest Arctic Borough35.9+0.2 pts
8Thurston County35.6+0.5 pts
9Dewey County35.4+0.6 pts
10Corson County35.4-0.1 pts
11Bethel Census Area35.4-0.4 pts
12Gaines County35.2+0.1 pts
13Sioux County35-1.1 pts
14Benson County34.2-0.5 pts
15Juab County33.9-0.1 pts
16Rolette County33.9-0.2 pts
17Morgan County33.7-0.5 pts
18Adams County33.6-0.3 pts
19Hamlin County33-0.2 pts
20Jefferson County32.9-0.5 pts
21Nome Census Area32.6+0.3 pts
22Ziebach County32.5+0.2 pts
23LaGrange County32.5-0.3 pts
24Roosevelt County32.3-0.4 pts
25Mellette County32.2-0.8 pts
26Tooele County32-0.4 pts
27Menominee County31.8-0.8 pts
28Big Horn County31.8-0.7 pts
29Duchesne County31.7-0.6 pts
30Uintah County31.6-0.8 pts
31Utah County31.6-0.4 pts
32Adams County31.50 pts
33Dillingham Census Area31.40 pts
34Long County31.3-0.1 pts
35Dallam County31.2+0.8 pts
36Bennett County31.2-0.1 pts
37Zapata County31.2-0.3 pts
38Franklin County30.9-0.4 pts
39Yoakum County30.9-0.1 pts
40Andrews County30.8-0 pts
41Box Elder County30.8-0.2 pts
42Cassia County30.8-0 pts
43Franklin County30.7-0.5 pts
44Colfax County30.5+0.2 pts
45Davis County30.5-0.7 pts
46Starr County30.4-0.3 pts
47McKenzie County30.4+0.8 pts
48Martin County30.4-0.1 pts
49Millard County30.3-0.7 pts
50Webb County30.3-0.5 pts
51Deaf Smith County30.3-0.2 pts
52Davis County30.3-0.1 pts
53Holmes County30.3-0.2 pts
54Geary County30.2+0.3 pts
55Ford County30.2-0.5 pts
55Maverick County30.2-0.2 pts
57Seward County30.1-0.3 pts
58Glacier County30-0.5 pts
59Scotland County30+0.2 pts
60Bailey County30+0.5 pts
61Rockland County30+0.4 pts
62Hidalgo County30-0.4 pts
63Moore County30-0.1 pts
64Zavala County29.9+0.1 pts
65Jerome County29.80 pts
66Mahnomen County29.6+0.6 pts
67Bonneville County29.6-0.5 pts
68Grant County29.6-0.2 pts
69Power County29.6-0.2 pts
70Daviess County29.5+0.4 pts
71Bingham County29.5-0.5 pts
72Tulare County29.5-0.3 pts
73Lake and Peninsula Borough29.4-1.1 pts
74Clark County29.3-0 pts
75Pottawatomie County29.3+0.1 pts
76Charles Mix County29.2+0.1 pts
77Beaver County29.2-0.5 pts
78Finney County29.2-0.3 pts
79Lyman County29.2+0.2 pts
80Ochiltree County29.1-0.5 pts
81Cochran County29.1+0.8 pts
82Kaufman County29.1+0.3 pts
83Ector County29+0.1 pts
84Sherman County29-0.2 pts
85Sevier County28.9-0.5 pts
86Liberty County28.9+0.8 pts
87Hanson County28.9-0 pts
88Lea County28.8-0.3 pts
89Midland County28.8+0.2 pts
90Castro County28.7+0.1 pts
91Emery County28.7-0.3 pts
92Caribou County28.6-0.4 pts
93Hamilton County28.6+0.8 pts
94Nobles County28.6+0.3 pts
95Lynn County28.6+0.1 pts
96Dakota County28.5-0 pts
97Lyon County28.5-0 pts
98Cache County28.5-0.5 pts
98Rosebud County28.5+0.3 pts
100Mountrail County28.4-0.2 pts
101Wasatch County28.4-0.8 pts
102Roberts County28.40 pts
103Dimmit County28.4+0.4 pts
104Clark County28.4+0.8 pts
105Parmer County28.4-0.2 pts
106Crane County28.3-0 pts
107Rich County28.3-1.3 pts
108Merced County28.3-0.2 pts
109Minidoka County28.2-0.2 pts
110Bryan County28.2-0.1 pts
110Scott County28.2+0.3 pts
112Kern County28.2-0.2 pts
113Kearny County28.2-0 pts
114San Juan County28.2-0.2 pts
115Texas County28.2-0.4 pts
116Terry County28.1+0.6 pts
117Stevens County28.1-0.4 pts
118Gray County28.1-0.1 pts
119Cameron County28.1-0.5 pts
120Blaine County28.1-1 pts
121Dawson County28+0.2 pts
122Grant County28-0.3 pts
123Sevier County28+0.1 pts
124Haskell County28-0.6 pts
125Graham County28+0.4 pts
126Yakima County28-0.3 pts
127Webster County28+0.4 pts
128Hoke County28-0.3 pts
129Williams County27.9+0.1 pts
130Beadle County27.90 pts
131Chambers County27.80 pts
132Elko County27.8-0.1 pts
133Hansford County27.7-0.3 pts
134Clark County27.7-0.2 pts
135Greenlee County27.7-0.3 pts
136Bear Lake County27.7+0.1 pts
137Ward County27.6-0.2 pts
138Reagan County27.6-0.9 pts
139Schuyler County27.5-0.1 pts
140Jim Hogg County27.5-0.6 pts
141Sioux County27.5-0.2 pts
142Val Verde County27.5-0 pts
143Titus County27.5-0.4 pts
144Wright County27.5-0.2 pts
145Yuma County27.4+0.4 pts
146Madera County27.4-0.1 pts
147Fresno County27.4-0.2 pts
148Hill County27.4+0.1 pts
149Colusa County27.3-0.1 pts
150Neshoba County27.3-0.2 pts
151Kendall County27.3-0.5 pts
152Oneida County27.3+0.6 pts
153Winkler County27.2-0.5 pts
154Adair County27.2-0.2 pts
154Lincoln County27.20 pts
156Iron County27.2-0.7 pts
157Imperial County27.2-0.1 pts
158Campbell County27.2-0.4 pts
159Todd County27.10 pts
160Hemphill County27.1-0.3 pts
161Christian County27+0.5 pts
162Canyon County27-0.4 pts
163Yuba County270 pts
164Fort Bend County27-0.3 pts
165Lincoln County26.9-0.3 pts
166Bell County26.9-0 pts
167St. Bernard Parish26.9-0.4 pts
168Uinta County26.9-0.7 pts
169Elkhart County26.9-0.3 pts
170Montgomery County26.9-0.1 pts
171Liberty County26.9+0.2 pts
172Sterling County26.9+0.2 pts
173Loudoun County26.9-0.5 pts
174Oconee County26.8-0.2 pts
175Hall County26.8-0.2 pts
176Curry County26.8-0.2 pts
177Dallas County26.8-0.2 pts
178Ascension Parish26.8-0.3 pts
179Atascosa County26.8-0.2 pts
179Conejos County26.8-0.2 pts
181Reeves County26.7+2.3 pts
182Sanpete County26.7-0.6 pts
183Rockwall County26.7-0.2 pts
183Wyandotte County26.7-0.2 pts
185Lamb County26.7-0.3 pts
186Floyd County26.7-0.1 pts
187Grant County26.7-0 pts
188Jim Wells County26.7-0.2 pts
189Effingham County26.7-0.2 pts
190Wichita County26.6+1 pts
191Kingfisher County26.6-0.1 pts
192Hockley County26.6-0.3 pts
193Weber County26.6-0.6 pts
194Dunn County26.6+0.2 pts
195Moody County26.6-0.1 pts
196Watonwan County26.6+1.3 pts
197Gooding County26.6-0.6 pts
198McKinley County26.5-0.7 pts
199Ellis County26.5-0 pts
200Kings County26.5-0.2 pts
201Gentry County26.5+0.2 pts
202Stanton County26.5-0.5 pts
203Tunica County26.5-0.5 pts
204Schley County26.5-0.1 pts
205Sarpy County26.5-0.5 pts
206Matanuska-Susitna Borough26.5-0.3 pts
207McCook County26.5+0.4 pts
208Twin Falls County26.5-0.4 pts
209Morgan County26.5+0.2 pts
210Wayne County26.4-0.2 pts
211Stafford County26.4-0.1 pts
212Forsyth County26.4-0.6 pts
213Morrow County26.4-0.6 pts
214Wright County26.4+0.4 pts
215Harmon County26.4+1.2 pts
216Prince William County26.4-0.1 pts
217McCurtain County26.4+0.5 pts
217Williamson County26.4-0.4 pts
219Fallon County26.4+0.6 pts
220Blaine County26.4+0.3 pts
221Canadian County26.3-0.2 pts
221Owyhee County26.3-0.2 pts
223Gove County26.3-0.3 pts
224Crittenden County26.3-0.4 pts
225Harnett County26.2-0.1 pts
226Meade County26.2-0.2 pts
227Crawford County26.2-0.2 pts
228Camp County26.2+0.1 pts
229Humboldt County26.2-0.2 pts
230Stanislaus County26.2-0.1 pts
231Pemiscot County26.2+0.2 pts
232Saline County26.1+0.4 pts
233Vernon County26.10 pts
234Union County26.1-0.4 pts
235Oldham County26.1-1.2 pts
236Buena Vista County26.1-0.3 pts
237Fremont County26.1-0.2 pts
238Benton County26.1-0.2 pts
239Brooks County26.10 pts
240McDonald County26-0.2 pts
241Sherburne County26-0.1 pts
242Coahoma County26-0.3 pts
243Gonzales County260 pts
244Buchanan County26-0.2 pts
245San Joaquin County26-0.3 pts
246Glenn County26+0.1 pts
247George County26+0.3 pts
248Livingston Parish26-0.1 pts
249Montgomery County26-0 pts
250Turner County26+0.4 pts

Showing the top 250 of 3144. The Excel download has every row.

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 (US counties by population under 18, 2022) [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 counties by population under 18, 2022. 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-counties?period=2022. 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 counties by population under 18, 2022. 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-counties?period=2022.

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 counties by population under 18, 2022 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/us-counties?period=2022 (Accessed: 12 October 2026).

BibTeX
@misc{census_us_counties_by_population_2022,
  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 counties by population under 18, 2022}},
  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-counties?period=2022. 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 counties by population under 18, 2022
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-counties?period=2022
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/us-counties?period=2022.
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 41.6% in 2022, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Sumter County, with 7.2% in 2022.

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 counties: more rankings