Data / Rankings / Population under 18 / US counties

US counties by population under 18

Kusilvak Census Area had the highest population under 18 of 3135 counties in 2014, at 41.2%. Kalawao County had the lowest, at 4.7%. The median was 22.5% and the figure for the United States was 23.1%. Source: the U.S. Census Bureau.

Highest41.2Kusilvak Census Area
Lowest4.7Kalawao County
Median22.53135 counties
United States23.1History

Top 40 counties, 2014

Kusilvak Census Area: 41.2 %Kusilvak Census Area41.2Todd County: 40.3 %Todd County40.3Buffalo County: 40.2 %Buffalo County40.2Ziebach County: 38.5 %Ziebach County38.5Oglala Lakota County: 38.1 %Oglala Lakota County38.1Sioux County: 37.5 %Sioux County37.5Bethel Census Area: 36 %Bethel Census Area36Northwest Arctic Borough: 35.9 %Northwest Arctic Borough35.9Morgan County: 35.8 %Morgan County35.8Juab County: 35.3 %Juab County35.3Tooele County: 35.1 %Tooele County35.1Thurston County: 35.1 %Thurston County35.1Jefferson County: 35 %Jefferson County35Utah County: 35 %Utah County35Gaines County: 34.7 %Gaines County34.7Adams County: 34.4 %Adams County34.4Nome Census Area: 34.4 %Nome Census Area34.4Franklin County: 34.3 %Franklin County34.3Uintah County: 34.3 %Uintah County34.3Rolette County: 34 %Rolette County34LaGrange County: 33.9 %LaGrange County33.9Duchesne County: 33.9 %Duchesne County33.9Corson County: 33.9 %Corson County33.9Davis County: 33.8 %Davis County33.8Benson County: 33.5 %Benson County33.5Bennett County: 33.5 %Bennett County33.5Big Horn County: 33.4 %Big Horn County33.4Webb County: 33.4 %Webb County33.4Franklin County: 33.4 %Franklin County33.4Holmes County: 33.3 %Holmes County33.3Box Elder County: 33.1 %Box Elder County33.1Hidalgo County: 33.1 %Hidalgo County33.1Zapata County: 33 %Zapata County33Wasatch County: 32.9 %Wasatch County32.9Jackson County: 32.8 %Jackson County32.8Menominee County: 32.6 %Menominee County32.6Cassia County: 32.5 %Cassia County32.5Dewey County: 32.5 %Dewey County32.5Hanson County: 32.4 %Hanson County32.4Starr County: 32.3 %Starr County32.3
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2014 (%)Change on 2013
1Kusilvak Census Area41.20 pts
2Todd County40.3+0.1 pts
3Buffalo County40.2+0.4 pts
4Ziebach County38.5-0.1 pts
5Oglala Lakota County38.1-0.1 pts
6Sioux County37.5-0 pts
7Bethel Census Area36+0.1 pts
8Northwest Arctic Borough35.9+0.3 pts
9Morgan County35.8+0.2 pts
10Juab County35.3+0.1 pts
11Tooele County35.1-0.3 pts
12Thurston County35.1+0.3 pts
13Jefferson County35+0.1 pts
14Utah County35-0.1 pts
15Gaines County34.7-0 pts
16Adams County34.4-0 pts
17Nome Census Area34.4-0.1 pts
18Franklin County34.3-0.4 pts
19Uintah County34.3+0.4 pts
20Rolette County34+0.3 pts
21LaGrange County33.9-0.2 pts
22Duchesne County33.9-0.1 pts
23Corson County33.9+0.2 pts
24Davis County33.8-0.2 pts
25Benson County33.5-0.3 pts
26Bennett County33.5+0.6 pts
27Big Horn County33.4+0.3 pts
28Webb County33.4-0.4 pts
29Franklin County33.4-0.1 pts
30Holmes County33.3-0.4 pts
31Box Elder County33.10 pts
32Hidalgo County33.1-0.4 pts
33Zapata County33-0.4 pts
34Wasatch County32.9-0.5 pts
35Jackson County32.80 pts
36Menominee County32.6-0.5 pts
37Cassia County32.5-0.1 pts
38Dewey County32.5+0.1 pts
39Hanson County32.4+0.4 pts
40Starr County32.3-0.3 pts
41Grant County32.1+0.1 pts
42Bingham County32-0.1 pts
43San Juan County31.9-0.3 pts
44Lincoln County31.8-0.1 pts
45Hamlin County31.7+0.6 pts
46Deaf Smith County31.7-0.1 pts
47Maverick County31.6-0.4 pts
48Tulare County31.5-0.2 pts
49Emery County31.5-0.3 pts
50Mellette County31.40 pts
51Bonneville County31.4-0 pts
52Millard County31.4-0.1 pts
53Seward County31.40 pts
54Ochiltree County31.3-0 pts
55Dillingham Census Area31.3-0.8 pts
56Beaver County31.3-0.8 pts
57Cameron County31.3-0.4 pts
58Bailey County31.3-0.5 pts
59Adams County31.3+0.2 pts
60Glacier County31.2-0 pts
61Roosevelt County31.1+0.8 pts
62Finney County31.1-0.2 pts
63Sevier County31.1-0.4 pts
64Jerome County31.10 pts
65Ford County310 pts
66Moore County31-0.3 pts
67Stevens County31+0.3 pts
68Yoakum County30.9-0 pts
69Cache County30.9-0.1 pts
70Oldham County30.9-0.9 pts
71Hemphill County30.9+0.4 pts
72Power County30.9-0 pts
73Hamilton County30.5+1.8 pts
73Zavala County30.5-0.1 pts
75Canyon County30.4-0.3 pts
76Long County30.3-0.1 pts
77Kendall County30.3-0.1 pts
78Loving County30.2-0.8 pts
79Rich County30.2-0.4 pts
80Geary County30.1-0.2 pts
81Andrews County30.10 pts
82Dallam County30+0.2 pts
83Uinta County30+0.3 pts
84Crane County30+0.6 pts
85Lea County30+0.2 pts
86Merced County30-0.3 pts
87Mahnomen County29.9+0.6 pts
88Grant County29.9-0.3 pts
89Dimmit County29.9-0.1 pts
90Reagan County29.9-0.2 pts
91Tunica County29.9+0.1 pts
92Colfax County29.8+0.5 pts
93Castro County29.8-0.6 pts
94Forsyth County29.8-0.2 pts
95Clark County29.7+1.2 pts
96Loudoun County29.7-0.3 pts
97McKinley County29.7-0 pts
98Fremont County29.7-0.4 pts
99Arthur County29.7+0.9 pts
100Martin County29.6+0.4 pts
101Blaine County29.6+0.2 pts
102Yakima County29.6-0.2 pts
103Lincoln County29.5-0.1 pts
104Haskell County29.50 pts
105Jim Hogg County29.5+0.9 pts
105Winkler County29.5-0.1 pts
107Schleicher County29.5+0.4 pts
108Caribou County29.4+0.1 pts
109Weber County29.4-0.1 pts
110Parmer County29.4-0.3 pts
111Lyman County29.4+0.5 pts
112Iron County29.4+0.1 pts
113Kern County29.3-0.2 pts
114Gray County29.3-0 pts
115Pottawatomie County29.3-0.3 pts
116Dakota County29.2-0 pts
117Cochran County29.2-0.1 pts
118Hoke County29.2-0.1 pts
119Wright County29.2-0.1 pts
120Washington County29.1-0.3 pts
121Sanpete County29.1-0 pts
122Sevier County29.1+0.1 pts
123Charles Mix County29.1+0.1 pts
124Hamilton County29.1-0.2 pts
125Kenedy County29.1+1.7 pts
126Dallas County29-0 pts
127Clark County29-0.3 pts
128Union County29-0.2 pts
129Scotland County290 pts
130Scott County29-0.2 pts
131Minidoka County28.9+0.4 pts
132Douglas County28.9-0.4 pts
133Manassas Park city28.9+0.7 pts
134Daviess County28.9-0.1 pts
135Kearny County28.90 pts
136Hansford County28.8-0.6 pts
137Graham County28.8+0.1 pts
138Gooding County28.8-0.4 pts
139Davis County28.8-0.3 pts
140Titus County28.8-0.5 pts
141Bryan County28.7+0.1 pts
142Greenlee County28.7-0.2 pts
143Fresno County28.7-0.2 pts
144Teton County28.7-0.8 pts
145Texas County28.6+0.2 pts
146Ector County28.60 pts
147Williamson County28.6-0.1 pts
148Campbell County28.6+0.3 pts
149Rosebud County28.5-0.1 pts
150Apache County28.5-0.6 pts
151Lyon County28.5+0.4 pts
152Sarpy County28.5-0.1 pts
153Conejos County28.4+0.2 pts
154Stanton County28.4-0.3 pts
155Paulding County28.3-0.4 pts
156Sherman County28.3-0.1 pts
157Colusa County28.3-0.2 pts
158Fort Bend County28.3-0.2 pts
159Val Verde County28.3-0.3 pts
160Salt Lake County28.3-0.2 pts
161Carver County28.3-0.3 pts
162Liberty County28.3-0.9 pts
163Schley County28.30 pts
164Leake County28.3-0.8 pts
165Elko County28.3-0.1 pts
166Dawson County28.3-0.1 pts
167Rockwall County28.2-0.4 pts
168Santa Cruz County28.2-0.5 pts
169Morrow County28.2+0.1 pts
170Delaware County28.2-0.2 pts
171Lamb County28.2-0.6 pts
172Lake and Peninsula Borough28.1-1.2 pts
173Kaufman County28.1-0.2 pts
174San Juan County28.1-0 pts
175Navajo County28-0.3 pts
176Imperial County28-0.2 pts
177Wyandotte County28-0.1 pts
178Jim Wells County28-0.3 pts
179Prince William County28-0.3 pts
180Roberts County28+0.3 pts
181El Paso County28-0.5 pts
182Elkhart County28-0.1 pts
183Atkinson County28-0.3 pts
184Ascension Parish28-0.1 pts
185Neshoba County27.9-0.2 pts
186Madera County27.9-0.3 pts
187Oneida County27.9-0.7 pts
188Dodge County27.9-0.2 pts
189Rockland County27.9-0 pts
190Upton County27.9-0.3 pts
191Adams County27.8-0.3 pts
191Chambers County27.8-0.1 pts
193Bear Lake County27.8-0.2 pts
194Twin Falls County27.80 pts
195San Joaquin County27.8-0.3 pts
196McKenzie County27.8+1.3 pts
197Harnett County27.7-0.1 pts
198Clayton County27.7-0.3 pts
199Gwinnett County27.7-0.3 pts
200Atascosa County27.7-0.3 pts
201Owyhee County27.7-0.7 pts
202Benton County27.70 pts
203Matanuska-Susitna Borough27.6-0.2 pts
204Collingsworth County27.6-1.1 pts
205Jeff Davis County27.6+0.4 pts
206Collin County27.6-0.2 pts
207Oconee County27.6+0.2 pts
208Williamson County27.6-0.3 pts
209St. Bernard Parish27.5+0.3 pts
210Yuba County27.5-0.4 pts
211Sherburne County27.5-0.4 pts
212Sioux County27.5+0.1 pts
213Boone County27.5-0.3 pts
214Lynn County27.5+0.3 pts
215Sweetwater County27.5+0.2 pts
216Crittenden County27.4-0.3 pts
217Hale County27.4-0.6 pts
218Coahoma County27.4-0.4 pts
219Kings County27.4-0 pts
220Chaves County27.4-0.1 pts
221Meade County27.4+0.3 pts
222Grant County27.4+0.2 pts
223Whitfield County27.4-0.1 pts
224Payette County27.4+0.1 pts
225Bell County27.4-0.1 pts
226Montgomery County27.3-0 pts
227Stafford County27.3-0.2 pts
228Effingham County27.3-0.1 pts
228Ellis County27.3-0.3 pts
230Christian County27.3-0.6 pts
231Todd County27.3-0 pts
232Lincoln County27.3-0 pts
233Curry County27.3-0.1 pts
233Weld County27.3-0 pts
235Boone County27.3-0.1 pts
236Kane County27.3-0.5 pts
237Kingfisher County27.3+0.5 pts
238Hendry County27.3-0.3 pts
239Barrow County27.2-0.1 pts
240Lipscomb County27.2-0.4 pts
241Floyd County27.2-0.8 pts
242Echols County27.20 pts
243Henry County27.2-0.4 pts
244Uvalde County27.2-0.3 pts
245Yukon-Koyukuk Census Area27.2-0.2 pts
246Webster County27.2+0.1 pts
247Wayne County27.2-1 pts
248Stanislaus County27.1-0.3 pts
249Sterling County27.1+1.3 pts
250Crosby County27.1-1 pts

Showing the top 250 of 3135. 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. 9 counties with data in other periods have no value for 2014 and are left out rather than filled from another source. 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, 2014) [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, 2014. 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=2014. 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, 2014. 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=2014.

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, 2014 [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=2014 (Accessed: 12 October 2026).

BibTeX
@misc{census_us_counties_by_population_2014,
  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, 2014}},
  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=2014. 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, 2014
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=2014
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/us-counties?period=2014.
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 41.2% in 2014, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Kalawao County, with 4.7% in 2014.

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. 9 counties have no value for 2014 and are not ranked.

Population under 18: other rankings

US counties: more rankings