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 2020, at 30.7%. Riley County had the lowest, at 17%. The median was 23.4% and the figure for Kansas was 24.1%. Source: the U.S. Census Bureau.

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Highest30.7Ford County
Lowest17Riley County
Median23.4105 counties
Kansas24.1History

Map of counties, 2020

Allen County: 22.1 %Anderson County: 25.7 %Atchison County: 22 %Barber County: 22.5 %Barton County: 24.2 %Bourbon County: 25.6 %Brown County: 25 %Butler County: 25.6 %Chase County: 19.7 %Chautauqua County: 22.1 %Cherokee County: 23.4 %Cheyenne County: 22.1 %Clark County: 22.6 %Clay County: 23 %Cloud County: 22.4 %Coffey County: 22.6 %Comanche County: 23.2 %Cowley County: 23.7 %Crawford County: 22.7 %Decatur County: 20.6 %Dickinson County: 23.1 %Doniphan County: 22 %Douglas County: 18.9 %Edwards County: 22.3 %Elk County: 21.7 %Ellis County: 20.8 %Ellsworth County: 18.3 %Finney County: 29.5 %Ford County: 30.7 %Franklin County: 23.7 %Geary County: 29.6 %Gove County: 25.6 %Graham County: 20.4 %Grant County: 29.8 %Gray County: 28.1 %Greeley County: 24.5 %Greenwood County: 21.3 %Hamilton County: 28.6 %Harper County: 24.7 %Harvey County: 24 %Haskell County: 29.5 %Hodgeman County: 24 %Jackson County: 25.7 %Jefferson County: 23.4 %Jewell County: 20.6 %Johnson County: 24.2 %Kearny County: 28.7 %Kingman County: 22 %Kiowa County: 22.7 %Labette County: 25.2 %Lane County: 21.5 %Leavenworth County: 24 %Lincoln County: 22.8 %Linn County: 22.7 %Logan County: 24.9 %Lyon County: 22.4 %McPherson County: 21.9 %Marion County: 21.5 %Marshall County: 23.7 %Meade County: 26.4 %Miami County: 24.7 %Mitchell County: 23 %Montgomery County: 23.6 %Morris County: 21.8 %Morton County: 23.8 %Nemaha County: 26 %Neosho County: 24.7 %Ness County: 20.6 %Norton County: 19.4 %Osage County: 23.2 %Osborne County: 21.1 %Ottawa County: 23 %Pawnee County: 19.4 %Phillips County: 22.6 %Pottawatomie County: 29.2 %Pratt County: 24.1 %Rawlins County: 22.2 %Reno County: 22.3 %Republic County: 21 %Rice County: 23.3 %Riley County: 17 %Rooks County: 22.3 %Rush County: 19.5 %Russell County: 22.8 %Saline County: 23.1 %Scott County: 25.7 %Sedgwick County: 25.2 %Seward County: 30.6 %Shawnee County: 23.4 %Sheridan County: 24.6 %Sherman County: 23.9 %Smith County: 19.6 %Stafford County: 23.7 %Stanton County: 27.7 %Stevens County: 28.2 %Sumner County: 24.3 %Thomas County: 23.6 %Trego County: 20.3 %Wabaunsee County: 23.6 %Wallace County: 25.7 %Washington County: 23.8 %Wichita County: 25.9 %Wilson County: 23.4 %Woodson County: 20.8 %Wyandotte County: 27.2 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 to 26
  • 26 and over
%, 2020. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2020

Ford County: 30.7 %Ford County30.7Seward County: 30.6 %Seward County30.6Grant County: 29.8 %Grant County29.8Geary County: 29.6 %Geary County29.6Finney County: 29.5 %Finney County29.5Haskell County: 29.5 %Haskell County29.5Pottawatomie County: 29.2 %Pottawatomie County29.2Kearny County: 28.7 %Kearny County28.7Hamilton County: 28.6 %Hamilton County28.6Stevens County: 28.2 %Stevens County28.2Gray County: 28.1 %Gray County28.1Stanton County: 27.7 %Stanton County27.7Wyandotte County: 27.2 %Wyandotte County27.2Meade County: 26.4 %Meade County26.4Nemaha County: 26 %Nemaha County26Wichita County: 25.9 %Wichita County25.9Scott County: 25.7 %Scott County25.7Jackson County: 25.7 %Jackson County25.7Wallace County: 25.7 %Wallace County25.7Anderson County: 25.7 %Anderson County25.7Bourbon County: 25.6 %Bourbon County25.6Butler County: 25.6 %Butler County25.6Gove County: 25.6 %Gove County25.6Labette County: 25.2 %Labette County25.2Sedgwick County: 25.2 %Sedgwick County25.2Brown County: 25 %Brown County25Logan County: 24.9 %Logan County24.9Neosho County: 24.7 %Neosho County24.7Harper County: 24.7 %Harper County24.7Miami County: 24.7 %Miami County24.7Sheridan County: 24.6 %Sheridan County24.6Greeley County: 24.5 %Greeley County24.5Sumner County: 24.3 %Sumner County24.3Barton County: 24.2 %Barton County24.2Johnson County: 24.2 %Johnson County24.2Pratt County: 24.1 %Pratt County24.1Leavenworth County: 24 %Leavenworth County24Hodgeman County: 24 %Hodgeman County24Harvey County: 24 %Harvey County24Sherman County: 23.9 %Sherman County23.9Ford County: 30.7 %Ford County30.7Seward County: 30.6 %Seward County30.6Grant County: 29.8 %Grant County29.8Geary County: 29.6 %Geary County29.6Finney County: 29.5 %Finney County29.5Haskell County: 29.5 %Haskell County29.5Pottawatomie County: 29.2 %Pottawatomie County29.2Kearny County: 28.7 %Kearny County28.7Hamilton County: 28.6 %Hamilton County28.6Stevens County: 28.2 %Stevens County28.2Gray County: 28.1 %Gray County28.1Stanton County: 27.7 %Stanton County27.7Wyandotte County: 27.2 %Wyandotte County27.2Meade County: 26.4 %Meade County26.4Nemaha County: 26 %Nemaha County26Wichita County: 25.9 %Wichita County25.9Scott County: 25.7 %Scott County25.7Jackson County: 25.7 %Jackson County25.7Wallace County: 25.7 %Wallace County25.7Anderson County: 25.7 %Anderson County25.7Bourbon County: 25.6 %Bourbon County25.6Butler County: 25.6 %Butler County25.6Gove County: 25.6 %Gove County25.6Labette County: 25.2 %Labette County25.2Sedgwick County: 25.2 %Sedgwick County25.2Brown County: 25 %Brown County25Logan County: 24.9 %Logan County24.9Neosho County: 24.7 %Neosho County24.7Harper County: 24.7 %Harper County24.7Miami County: 24.7 %Miami County24.7Sheridan County: 24.6 %Sheridan County24.6Greeley County: 24.5 %Greeley County24.5Sumner County: 24.3 %Sumner County24.3Barton County: 24.2 %Barton County24.2Johnson County: 24.2 %Johnson County24.2Pratt County: 24.1 %Pratt County24.1Leavenworth County: 24 %Leavenworth County24Hodgeman County: 24 %Hodgeman County24Harvey County: 24 %Harvey County24Sherman County: 23.9 %Sherman County23.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2020 (%)Change on 2019
1Ford County30.7-0.1 pts
2Seward County30.6-0.3 pts
3Grant County29.8-0.3 pts
4Geary County29.6+0.4 pts
5Finney County29.5-0.1 pts
6Haskell County29.5-0.9 pts
7Pottawatomie County29.2-0.1 pts
8Kearny County28.7+0.2 pts
9Hamilton County28.6-1.3 pts
10Stevens County28.2-0.6 pts
11Gray County28.1-0 pts
12Stanton County27.7-0.7 pts
13Wyandotte County27.20 pts
14Meade County26.4+0.3 pts
15Nemaha County26-0 pts
16Wichita County25.90 pts
17Scott County25.7-0.7 pts
18Jackson County25.7+0.3 pts
19Wallace County25.7+0.9 pts
20Anderson County25.7+0.3 pts
21Bourbon County25.6+0.2 pts
22Butler County25.6-0.2 pts
23Gove County25.6-0.6 pts
24Labette County25.2+0.3 pts
25Sedgwick County25.2-0.1 pts
26Brown County25+0.3 pts
27Logan County24.9-0.1 pts
28Neosho County24.7-0.1 pts
29Harper County24.7+0.3 pts
30Miami County24.7-0.1 pts
31Sheridan County24.6-0 pts
32Greeley County24.5+0.1 pts
33Sumner County24.3-0.3 pts
34Barton County24.2+0.1 pts
35Johnson County24.2-0.3 pts
36Pratt County24.1+0.2 pts
37Leavenworth County240 pts
38Hodgeman County24-0.7 pts
39Harvey County240 pts
40Sherman County23.9-0.4 pts
41Morton County23.8-0.5 pts
42Washington County23.8+1 pts
43Stafford County23.7+0.8 pts
44Marshall County23.7-0.3 pts
45Cowley County23.7+0.1 pts
46Franklin County23.70 pts
47Montgomery County23.6-0.1 pts
48Wabaunsee County23.6-0.2 pts
49Thomas County23.6+0.3 pts
50Cherokee County23.4+0.3 pts
51Shawnee County23.4-0.1 pts
52Wilson County23.4-0.2 pts
53Jefferson County23.4+0.1 pts
54Rice County23.3+0.1 pts
55Comanche County23.2-0.1 pts
56Osage County23.2-0.1 pts
57Dickinson County23.1-0.4 pts
58Saline County23.1-0.2 pts
59Mitchell County23+0.2 pts
60Clay County23+0.6 pts
61Ottawa County23+0.3 pts
62Lincoln County22.8-0.6 pts
63Russell County22.8+0.3 pts
64Crawford County22.7+0.2 pts
65Linn County22.7-0.3 pts
66Kiowa County22.7-0.3 pts
67Clark County22.60 pts
68Coffey County22.6-0.5 pts
69Phillips County22.6+0.5 pts
70Barber County22.5+0.9 pts
71Cloud County22.4-0.4 pts
72Lyon County22.4+0.2 pts
73Rooks County22.3+0.3 pts
74Edwards County22.3+0.1 pts
75Reno County22.3-0.1 pts
76Rawlins County22.2-0.1 pts
77Allen County22.1+0.5 pts
78Chautauqua County22.1+0.8 pts
79Cheyenne County22.1+0.2 pts
80Atchison County22-0.2 pts
81Kingman County22-0.9 pts
82Doniphan County22-0.2 pts
83McPherson County21.9-0.2 pts
84Morris County21.8+0.4 pts
85Elk County21.7-0.2 pts
86Lane County21.5+0.8 pts
87Marion County21.5-0.4 pts
88Greenwood County21.3-0.2 pts
89Osborne County21.1-0 pts
90Republic County21-0.1 pts
91Ellis County20.80 pts
92Woodson County20.8-0.9 pts
93Ness County20.6+1.2 pts
94Decatur County20.6+0.1 pts
95Jewell County20.6-0.2 pts
96Graham County20.4-0.5 pts
97Trego County20.3+0.2 pts
98Chase County19.7-1.1 pts
99Smith County19.6-0.5 pts
100Rush County19.5-1.3 pts
101Pawnee County19.4-0.6 pts
102Norton County19.4+0.6 pts
103Douglas County18.9-0.2 pts
104Ellsworth County18.3-0.9 pts
105Riley County17-0.4 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, 2020) [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, 2020. 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=2020. 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, 2020. 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=2020.

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, 2020 [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=2020 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_kansas_by_2020,
  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, 2020}},
  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=2020. 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, 2020
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=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/kansas-counties?period=2020.
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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Rank Counties in Kansas by population under 18 using official data, and cite the source.
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Questions

Which county has the highest population under 18?

Ford County, with 30.7% in 2020, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Riley County, with 17% in 2020.

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