Data / Rankings / Population under 18 / Counties in Kansas

Counties in Kansas by population under 18

Ford County had the highest population under 18 of 105 counties in 2021, at 30.6%. Riley County had the lowest, at 16.7%. The median was 23.2% and the figure for Kansas was 23.9%. Source: the U.S. Census Bureau.

Highest30.6Ford County
Lowest16.7Riley County
Median23.2105 counties
Kansas23.9History

Top 40 counties, 2021

Ford County: 30.6 %Ford County30.6Seward County: 30.4 %Seward County30.4Geary County: 29.9 %Geary County29.9Grant County: 29.8 %Grant County29.8Finney County: 29.5 %Finney County29.5Pottawatomie County: 29.2 %Pottawatomie County29.2Haskell County: 28.6 %Haskell County28.6Stevens County: 28.5 %Stevens County28.5Gray County: 28.2 %Gray County28.2Kearny County: 28.2 %Kearny County28.2Hamilton County: 27.8 %Hamilton County27.8Stanton County: 27 %Stanton County27Wyandotte County: 26.9 %Wyandotte County26.9Wallace County: 26.6 %Wallace County26.6Gove County: 26.6 %Gove County26.6Meade County: 26.4 %Meade County26.4Nemaha County: 26.2 %Nemaha County26.2Scott County: 26.1 %Scott County26.1Bourbon County: 25.9 %Bourbon County25.9Wichita County: 25.6 %Wichita County25.6Jackson County: 25.4 %Jackson County25.4Anderson County: 25.4 %Anderson County25.4Greeley County: 25.4 %Greeley County25.4Butler County: 25.3 %Butler County25.3Brown County: 25 %Brown County25Labette County: 25 %Labette County25Sheridan County: 25 %Sheridan County25Sedgwick County: 24.9 %Sedgwick County24.9Logan County: 24.9 %Logan County24.9Neosho County: 24.7 %Neosho County24.7Miami County: 24.4 %Miami County24.4Harper County: 24.4 %Harper County24.4Barton County: 24.3 %Barton County24.3Morton County: 24.1 %Morton County24.1Sumner County: 24.1 %Sumner County24.1Washington County: 24.1 %Washington County24.1Leavenworth County: 23.9 %Leavenworth County23.9Pratt County: 23.9 %Pratt County23.9Sherman County: 23.9 %Sherman County23.9Stafford County: 23.9 %Stafford County23.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)Change on 2020
1Ford County30.6-0.1 pts
2Seward County30.4-0.3 pts
3Geary County29.9+0.3 pts
4Grant County29.8-0 pts
5Finney County29.5-0 pts
6Pottawatomie County29.20 pts
7Haskell County28.6-0.9 pts
8Stevens County28.5+0.3 pts
9Gray County28.2+0.1 pts
10Kearny County28.2-0.5 pts
11Hamilton County27.8-0.8 pts
12Stanton County27-0.7 pts
13Wyandotte County26.9-0.3 pts
14Wallace County26.6+1 pts
15Gove County26.6+1 pts
16Meade County26.4-0 pts
17Nemaha County26.2+0.2 pts
18Scott County26.1+0.4 pts
19Bourbon County25.9+0.2 pts
20Wichita County25.6-0.2 pts
21Jackson County25.4-0.2 pts
22Anderson County25.4-0.2 pts
23Greeley County25.4+0.8 pts
24Butler County25.3-0.3 pts
25Brown County250 pts
26Labette County25-0.2 pts
27Sheridan County25+0.4 pts
28Sedgwick County24.9-0.3 pts
29Logan County24.9-0.1 pts
30Neosho County24.70 pts
31Miami County24.4-0.3 pts
32Harper County24.4-0.3 pts
33Barton County24.3+0.2 pts
34Morton County24.1+0.3 pts
35Sumner County24.1-0.2 pts
36Washington County24.1+0.3 pts
37Leavenworth County23.9-0.1 pts
38Pratt County23.9-0.1 pts
39Sherman County23.9-0 pts
40Stafford County23.9+0.2 pts
41Cowley County23.8+0.1 pts
42Johnson County23.8-0.4 pts
43Wilson County23.7+0.3 pts
44Harvey County23.7-0.3 pts
45Thomas County23.7+0.1 pts
46Marshall County23.6-0.1 pts
47Wabaunsee County23.6-0 pts
48Franklin County23.5-0.2 pts
49Rice County23.4+0.2 pts
50Montgomery County23.4-0.2 pts
51Cherokee County23.3-0.1 pts
52Hodgeman County23.3-0.7 pts
53Mitchell County23.2+0.2 pts
54Dickinson County23.2+0.1 pts
55Osage County23.1-0.1 pts
56Shawnee County23.1-0.3 pts
57Jefferson County23-0.3 pts
58Ottawa County22.9-0 pts
59Kiowa County22.9+0.2 pts
60Linn County22.8+0.1 pts
61Russell County22.7-0.1 pts
62Cheyenne County22.7+0.6 pts
63Saline County22.7-0.4 pts
64Clay County22.6-0.4 pts
65Crawford County22.5-0.2 pts
66Cloud County22.5+0.1 pts
67Comanche County22.5-0.8 pts
68Rawlins County22.4+0.2 pts
69Barber County22.3-0.2 pts
70Coffey County22.3-0.3 pts
71Lincoln County22.3-0.6 pts
72Kingman County22.2+0.3 pts
73Chautauqua County22.2+0.1 pts
74Lyon County22.2-0.2 pts
75Clark County22.2-0.5 pts
76Phillips County22.1-0.4 pts
77Edwards County22.1-0.2 pts
78Reno County21.9-0.4 pts
79Doniphan County21.9-0.1 pts
80Osborne County21.8+0.7 pts
81Rooks County21.8-0.5 pts
82McPherson County21.8-0.1 pts
83Allen County21.7-0.5 pts
84Morris County21.6-0.2 pts
85Atchison County21.6-0.4 pts
86Decatur County21.5+0.9 pts
87Lane County21.5-0 pts
88Republic County21.2+0.2 pts
89Marion County21.2-0.2 pts
90Greenwood County21-0.3 pts
91Ness County20.8+0.2 pts
92Jewell County20.8+0.2 pts
93Elk County20.7-0.9 pts
94Graham County20.5+0.1 pts
95Woodson County20.2-0.6 pts
96Ellis County20.2-0.6 pts
97Trego County20.1-0.2 pts
98Chase County19.8+0.1 pts
99Pawnee County19.6+0.2 pts
100Rush County19.6+0.2 pts
101Smith County19.6-0 pts
102Norton County19.3-0.1 pts
103Douglas County18.5-0.4 pts
104Ellsworth County18.30 pts
105Riley County16.7-0.3 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 Kansas by population under 18, 2021) [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 Kansas by population under 18, 2021. 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/kansas-counties?period=2021. 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 Kansas by population under 18, 2021. 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/kansas-counties?period=2021.

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 Kansas by population under 18, 2021 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/kansas-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_kansas_by_2021,
  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 Kansas by population under 18, 2021}},
  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/kansas-counties?period=2021. 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 Kansas by population under 18, 2021
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/kansas-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/kansas-counties?period=2021.
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?

Ford County, with 30.6% in 2021, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Riley County, with 16.7% in 2021.

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 Kansas: more rankings