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 2024, at 30.8%. Riley County had the lowest, at 16.6%. The median was 23.2% and the figure for Kansas was 23.2%. Source: the U.S. Census Bureau.

Highest30.8Geary County
Lowest16.6Riley County
Median23.2105 counties
Kansas23.2History

Top 40 counties, 2024

Geary County: 30.8 %Geary County30.8Ford County: 30.1 %Ford County30.1Seward County: 29.9 %Seward County29.9Hamilton County: 29.1 %Hamilton County29.1Grant County: 28.8 %Grant County28.8Gray County: 28.8 %Gray County28.8Finney County: 28.6 %Finney County28.6Kearny County: 28.6 %Kearny County28.6Pottawatomie County: 28.4 %Pottawatomie County28.4Haskell County: 28.1 %Haskell County28.1Wichita County: 27.6 %Wichita County27.6Stevens County: 27 %Stevens County27Wallace County: 26.8 %Wallace County26.8Gove County: 26.4 %Gove County26.4Stanton County: 26.3 %Stanton County26.3Wyandotte County: 26.3 %Wyandotte County26.3Meade County: 26.1 %Meade County26.1Greeley County: 25.9 %Greeley County25.9Nemaha County: 25.9 %Nemaha County25.9Logan County: 25.6 %Logan County25.6Bourbon County: 25.5 %Bourbon County25.5Scott County: 25.1 %Scott County25.1Jackson County: 24.9 %Jackson County24.9Hodgeman County: 24.9 %Hodgeman County24.9Anderson County: 24.9 %Anderson County24.9Harper County: 24.7 %Harper County24.7Labette County: 24.6 %Labette County24.6Comanche County: 24.6 %Comanche County24.6Washington County: 24.5 %Washington County24.5Butler County: 24.3 %Butler County24.3Cheyenne County: 24.2 %Cheyenne County24.2Neosho County: 24.1 %Neosho County24.1Barton County: 24.1 %Barton County24.1Brown County: 24 %Brown County24Sedgwick County: 24 %Sedgwick County24Sheridan County: 23.9 %Sheridan County23.9Kiowa County: 23.8 %Kiowa County23.8Sumner County: 23.8 %Sumner County23.8Ottawa County: 23.7 %Ottawa County23.7Mitchell County: 23.6 %Mitchell County23.6
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Geary County30.8+0.3 pts
2Ford County30.1-0 pts
3Seward County29.9-0.2 pts
4Hamilton County29.1-0.3 pts
5Grant County28.8-0.7 pts
6Gray County28.8+0.4 pts
7Finney County28.6-0.4 pts
8Kearny County28.6+0.3 pts
9Pottawatomie County28.4-0.4 pts
10Haskell County28.1-0.5 pts
11Wichita County27.6+0.4 pts
12Stevens County27-0.8 pts
13Wallace County26.8+0.2 pts
14Gove County26.4+0.3 pts
15Stanton County26.3-0.1 pts
16Wyandotte County26.3-0.2 pts
17Meade County26.1+0.2 pts
18Greeley County25.9+0.1 pts
19Nemaha County25.90 pts
20Logan County25.6+0.5 pts
21Bourbon County25.5-0.3 pts
22Scott County25.1-0 pts
23Jackson County24.9-0.4 pts
24Hodgeman County24.9+0.3 pts
25Anderson County24.9-0.2 pts
26Harper County24.7-0.2 pts
27Labette County24.6-0.2 pts
28Comanche County24.6+0.8 pts
29Washington County24.5-0.1 pts
30Butler County24.3-0.4 pts
31Cheyenne County24.2+1.3 pts
32Neosho County24.10 pts
33Barton County24.1-0.2 pts
34Brown County24-0.6 pts
35Sedgwick County24-0.4 pts
36Sheridan County23.9-0.3 pts
37Kiowa County23.8+0.3 pts
38Sumner County23.8-0.3 pts
39Ottawa County23.7+0.1 pts
40Mitchell County23.6-0.2 pts
41Pratt County23.6+0.1 pts
42Sherman County23.5-0.5 pts
43Cowley County23.5-0.2 pts
44Leavenworth County23.4-0.4 pts
45Rawlins County23.4-0 pts
46Wilson County23.4-0.4 pts
47Dickinson County23.4-0 pts
48Thomas County23.3-0.4 pts
49Stafford County23.3-0.2 pts
50Rice County23.3-0.2 pts
51Miami County23.2-0.2 pts
52Chautauqua County23.2+0.5 pts
53Wabaunsee County23.2-0.3 pts
54Marshall County23.1-0.5 pts
55Harvey County23.1-0.1 pts
56Edwards County23+0.6 pts
57Cherokee County23-0.2 pts
58Morton County22.9-0.7 pts
59Lane County22.9+0.5 pts
60Johnson County22.8-0.4 pts
61Osborne County22.7-0.7 pts
62Cloud County22.6-0.2 pts
63Osage County22.6-0.4 pts
64Crawford County22.6-0.1 pts
65Linn County22.4-0.4 pts
66Franklin County22.4-0.5 pts
67Shawnee County22.4-0.3 pts
68Montgomery County22.3-0.7 pts
69Barber County22.3-0.3 pts
70Kingman County22.2-0.4 pts
71Phillips County22.20 pts
72Saline County22.2-0.2 pts
73Lincoln County22.1-0.1 pts
74Coffey County22-0.2 pts
75Republic County22+0.3 pts
76Clay County22-0.3 pts
77Allen County22-0.3 pts
78Jefferson County21.9-0.2 pts
79Lyon County21.9-0.3 pts
80Russell County21.9-0.2 pts
81Doniphan County21.60 pts
82Rooks County21.5-0.2 pts
83Clark County21.5+0.4 pts
84Reno County21.4-0.3 pts
85Morris County21.4-0.1 pts
86McPherson County21.4-0.3 pts
87Marion County21.40 pts
88Decatur County21.3-0.3 pts
89Atchison County21.2-0.2 pts
90Smith County20.8+0.7 pts
91Ness County20.70 pts
92Woodson County20.6-0 pts
93Greenwood County20.5-0.7 pts
94Jewell County20.4-0.1 pts
95Trego County20.3+0.2 pts
96Norton County19.9-0.1 pts
97Elk County19.8-1.2 pts
98Graham County19.6-0.6 pts
99Pawnee County19.6+0.1 pts
100Ellis County19.5-0.3 pts
101Rush County19.3-0.4 pts
102Chase County18.7-0.2 pts
103Ellsworth County18.7-0.4 pts
104Douglas County17.5-0.4 pts
105Riley County16.60 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, 2024) [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, 2024. 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=2024. 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, 2024. 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=2024.

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, 2024 [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=2024 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_kansas_by_2024,
  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, 2024}},
  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=2024. 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, 2024
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=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/kansas-counties?period=2024.
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 30.8% in 2024, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Riley County, with 16.6% in 2024.

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