Data / Rankings / Population under 18 / Counties in Kansas

Counties in Kansas by population under 18

Geary County had the highest population under 18 of 105 counties in 2023, at 30.5%. Riley County had the lowest, at 16.6%. The median was 23.4% and the figure for Kansas was 23.5%. Source: the U.S. Census Bureau.

Highest30.5Geary County
Lowest16.6Riley County
Median23.4105 counties
Kansas23.5History

Top 40 counties, 2023

Geary County: 30.5 %Geary County30.5Ford County: 30.2 %Ford County30.2Seward County: 30.1 %Seward County30.1Grant County: 29.5 %Grant County29.5Hamilton County: 29.4 %Hamilton County29.4Finney County: 29 %Finney County29Pottawatomie County: 28.8 %Pottawatomie County28.8Haskell County: 28.6 %Haskell County28.6Gray County: 28.4 %Gray County28.4Kearny County: 28.3 %Kearny County28.3Stevens County: 27.7 %Stevens County27.7Wichita County: 27.2 %Wichita County27.2Wallace County: 26.6 %Wallace County26.6Wyandotte County: 26.5 %Wyandotte County26.5Stanton County: 26.4 %Stanton County26.4Gove County: 26.1 %Gove County26.1Meade County: 25.9 %Meade County25.9Nemaha County: 25.9 %Nemaha County25.9Greeley County: 25.8 %Greeley County25.8Bourbon County: 25.8 %Bourbon County25.8Jackson County: 25.4 %Jackson County25.4Scott County: 25.2 %Scott County25.2Logan County: 25.2 %Logan County25.2Anderson County: 25.1 %Anderson County25.1Harper County: 24.9 %Harper County24.9Labette County: 24.8 %Labette County24.8Butler County: 24.7 %Butler County24.7Hodgeman County: 24.6 %Hodgeman County24.6Brown County: 24.6 %Brown County24.6Washington County: 24.6 %Washington County24.6Sedgwick County: 24.4 %Sedgwick County24.4Sheridan County: 24.2 %Sheridan County24.2Barton County: 24.2 %Barton County24.2Sumner County: 24.1 %Sumner County24.1Neosho County: 24.1 %Neosho County24.1Sherman County: 24 %Sherman County24Mitchell County: 23.8 %Mitchell County23.8Leavenworth County: 23.8 %Leavenworth County23.8Comanche County: 23.7 %Comanche County23.7Thomas County: 23.7 %Thomas County23.7
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2023 (%)Change on 2022
1Geary County30.5+0.4 pts
2Ford County30.2-0 pts
3Seward County30.1-0 pts
4Grant County29.5-0.1 pts
5Hamilton County29.4+0.8 pts
6Finney County29-0.2 pts
7Pottawatomie County28.8-0.5 pts
8Haskell County28.6+0.6 pts
9Gray County28.4+0.3 pts
10Kearny County28.3+0.1 pts
11Stevens County27.7-0.4 pts
12Wichita County27.2+0.6 pts
13Wallace County26.6+0.7 pts
14Wyandotte County26.5-0.2 pts
15Stanton County26.4-0.1 pts
16Gove County26.1-0.2 pts
17Meade County25.9-0.3 pts
18Nemaha County25.90 pts
19Greeley County25.8+0.1 pts
20Bourbon County25.8+0.1 pts
21Jackson County25.4-0.1 pts
22Scott County25.2-0 pts
23Logan County25.2-0.1 pts
24Anderson County25.1+0.6 pts
25Harper County24.9+0.2 pts
26Labette County24.8-0 pts
27Butler County24.7-0.4 pts
28Hodgeman County24.6-0.1 pts
29Brown County24.6-0.5 pts
30Washington County24.6+0.1 pts
31Sedgwick County24.4-0.3 pts
32Sheridan County24.2-0.1 pts
33Barton County24.20 pts
34Sumner County24.1-0 pts
35Neosho County24.1-0.1 pts
36Sherman County24+0.1 pts
37Mitchell County23.8+0.1 pts
38Leavenworth County23.8-0.1 pts
39Comanche County23.7+0.2 pts
40Thomas County23.7-0.1 pts
41Wilson County23.7-0.2 pts
42Ottawa County23.6+0.1 pts
43Cowley County23.6-0.1 pts
44Morton County23.6-0.5 pts
45Marshall County23.6-0.1 pts
46Stafford County23.5-0.4 pts
47Pratt County23.5-0.3 pts
48Kiowa County23.5+0.5 pts
49Rice County23.50 pts
50Wabaunsee County23.4+0.1 pts
51Miami County23.4-0.3 pts
52Rawlins County23.4-0 pts
53Osborne County23.4+0.3 pts
54Dickinson County23.4+0.2 pts
55Harvey County23.2-0.2 pts
56Johnson County23.2-0.3 pts
57Cherokee County23.1+0.1 pts
58Montgomery County23-0.3 pts
59Osage County22.9-0.2 pts
60Cheyenne County22.9+0.6 pts
61Franklin County22.9-0.2 pts
62Linn County22.80 pts
63Cloud County22.80 pts
64Shawnee County22.7-0.2 pts
65Chautauqua County22.7-0.1 pts
66Kingman County22.7+0.1 pts
67Crawford County22.6-0.1 pts
68Barber County22.6-0 pts
69Edwards County22.4+0.5 pts
70Lane County22.3+0.8 pts
71Saline County22.3-0.2 pts
72Clay County22.3+0.1 pts
73Coffey County22.2-0.2 pts
74Allen County22.2+0.1 pts
75Phillips County22.2+0.3 pts
76Lyon County22.2-0 pts
77Lincoln County22.1-0.1 pts
78Jefferson County22.1-0.5 pts
79Russell County22-0.2 pts
80Rooks County21.7+0.2 pts
81Republic County21.7+0.3 pts
82Reno County21.7-0.3 pts
83McPherson County21.7-0.1 pts
84Decatur County21.6+0.7 pts
85Doniphan County21.6-0.2 pts
86Morris County21.5-0.2 pts
87Marion County21.4-0.2 pts
88Atchison County21.3-0.2 pts
89Greenwood County21.2-0.3 pts
90Clark County21.1-1.8 pts
91Elk County21-0.1 pts
92Ness County20.70 pts
93Woodson County20.6+0.3 pts
94Jewell County20.5-0.4 pts
95Graham County20.2-0.5 pts
96Trego County20.2+0.3 pts
97Smith County20.1+0.4 pts
98Norton County19.9+0.1 pts
99Ellis County19.7-0.2 pts
100Rush County19.7-0.8 pts
101Pawnee County19.5-0.1 pts
102Ellsworth County19-0.1 pts
103Chase County18.9-0.3 pts
104Douglas County17.9-0.3 pts
105Riley County16.6+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 Kansas by population under 18, 2023) [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, 2023. 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=2023. 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, 2023. 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=2023.

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, 2023 [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=2023 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_kansas_by_2023,
  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, 2023}},
  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=2023. 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, 2023
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=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/kansas-counties?period=2023.
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?

Geary County, with 30.5% in 2023, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Riley County, with 16.6% in 2023.

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