Data / Rankings / Population under 18 / Counties in Missouri

Counties in Missouri by population under 18

Scotland County had the highest population under 18 of 115 counties in 2023, at 30.2%. Stone County had the lowest, at 17.4%. The median was 22.7% and the figure for Missouri was 22.1%. Source: the U.S. Census Bureau.

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Highest30.2Scotland County
Lowest17.4Stone County
Median22.7115 counties
Missouri22.1History

Map of counties, 2023

Adair County: 19.1 %Andrew County: 23.1 %Atchison County: 20.9 %Audrain County: 23.9 %Barry County: 23.2 %Barton County: 24.1 %Bates County: 23.1 %Benton County: 17.8 %Bollinger County: 23.1 %Boone County: 20.2 %Buchanan County: 22.1 %Butler County: 23.3 %Caldwell County: 23.4 %Callaway County: 21.3 %Camden County: 17.6 %Cape Girardeau County: 21 %Carroll County: 21.3 %Carter County: 23.5 %Cass County: 23.2 %Cedar County: 24.5 %Chariton County: 22.6 %Christian County: 25.6 %Clark County: 24.1 %Clay County: 23.5 %Clinton County: 22.9 %Cole County: 21.6 %Cooper County: 22.6 %Crawford County: 22.1 %Dade County: 21 %Dallas County: 23.6 %Daviess County: 25 %DeKalb County: 21.1 %Dent County: 22.7 %Douglas County: 24.2 %Dunklin County: 25.4 %Franklin County: 22 %Gasconade County: 20.5 %Gentry County: 26.3 %Greene County: 20.2 %Grundy County: 25.6 %Harrison County: 23.8 %Henry County: 22.3 %Hickory County: 18.8 %Holt County: 22.3 %Howard County: 21.4 %Howell County: 23.9 %Iron County: 22.2 %Jackson County: 22.4 %Jasper County: 24.2 %Jefferson County: 22.4 %Johnson County: 22.7 %Knox County: 23.8 %Laclede County: 24.3 %Lafayette County: 22.8 %Lawrence County: 25.6 %Lewis County: 20.8 %Lincoln County: 25.1 %Linn County: 23 %Livingston County: 21.6 %McDonald County: 25.8 %Macon County: 23.2 %Madison County: 22.2 %Maries County: 21.4 %Marion County: 22.8 %Mercer County: 24.2 %Miller County: 23.6 %Mississippi County: 21.9 %Moniteau County: 25.5 %Monroe County: 22.2 %Montgomery County: 21.3 %Morgan County: 22.9 %New Madrid County: 23.6 %Newton County: 23.8 %Nodaway County: 19.1 %Oregon County: 23.9 %Osage County: 22.7 %Ozark County: 19.1 %Pemiscot County: 26.1 %Perry County: 22.2 %Pettis County: 25.1 %Phelps County: 20.8 %Pike County: 22.7 %Platte County: 23 %Polk County: 23.8 %Pulaski County: 22.5 %Putnam County: 22.6 %Ralls County: 21.3 %Randolph County: 21.9 %Ray County: 23.1 %Reynolds County: 20.1 %Ripley County: 25.3 %St. Charles County: 22.4 %St. Clair County: 22 %Ste. Genevieve County: 21.3 %St. Francois County: 20.6 %St. Louis County: 21.6 %Saline County: 22 %Schuyler County: 27.9 %Scotland County: 30.2 %Scott County: 23.8 %Shannon County: 23.7 %Shelby County: 23.7 %Stoddard County: 22.3 %Stone County: 17.4 %Sullivan County: 22.8 %Taney County: 20.1 %Texas County: 22.3 %Vernon County: 24.6 %Warren County: 22.6 %Washington County: 22.9 %Wayne County: 20.4 %Webster County: 27.8 %Worth County: 19.5 %Wright County: 26.3 %St. Louis city: 17.6 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 and over
%, 2023. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2023

Scotland County: 30.2 %Scotland County30.2Schuyler County: 27.9 %Schuyler County27.9Webster County: 27.8 %Webster County27.8Gentry County: 26.3 %Gentry County26.3Wright County: 26.3 %Wright County26.3Pemiscot County: 26.1 %Pemiscot County26.1McDonald County: 25.8 %McDonald County25.8Grundy County: 25.6 %Grundy County25.6Lawrence County: 25.6 %Lawrence County25.6Christian County: 25.6 %Christian County25.6Moniteau County: 25.5 %Moniteau County25.5Dunklin County: 25.4 %Dunklin County25.4Ripley County: 25.3 %Ripley County25.3Lincoln County: 25.1 %Lincoln County25.1Pettis County: 25.1 %Pettis County25.1Daviess County: 25 %Daviess County25Vernon County: 24.6 %Vernon County24.6Cedar County: 24.5 %Cedar County24.5Laclede County: 24.3 %Laclede County24.3Jasper County: 24.2 %Jasper County24.2Mercer County: 24.2 %Mercer County24.2Douglas County: 24.2 %Douglas County24.2Barton County: 24.1 %Barton County24.1Clark County: 24.1 %Clark County24.1Oregon County: 23.9 %Oregon County23.9Howell County: 23.9 %Howell County23.9Audrain County: 23.9 %Audrain County23.9Harrison County: 23.8 %Harrison County23.8Polk County: 23.8 %Polk County23.8Scott County: 23.8 %Scott County23.8Newton County: 23.8 %Newton County23.8Knox County: 23.8 %Knox County23.8Shannon County: 23.7 %Shannon County23.7Shelby County: 23.7 %Shelby County23.7Miller County: 23.6 %Miller County23.6New Madrid County: 23.6 %New Madrid County23.6Dallas County: 23.6 %Dallas County23.6Carter County: 23.5 %Carter County23.5Clay County: 23.5 %Clay County23.5Caldwell County: 23.4 %Caldwell County23.4Scotland County: 30.2 %Scotland County30.2Schuyler County: 27.9 %Schuyler County27.9Webster County: 27.8 %Webster County27.8Gentry County: 26.3 %Gentry County26.3Wright County: 26.3 %Wright County26.3Pemiscot County: 26.1 %Pemiscot County26.1McDonald County: 25.8 %McDonald County25.8Grundy County: 25.6 %Grundy County25.6Lawrence County: 25.6 %Lawrence County25.6Christian County: 25.6 %Christian County25.6Moniteau County: 25.5 %Moniteau County25.5Dunklin County: 25.4 %Dunklin County25.4Ripley County: 25.3 %Ripley County25.3Lincoln County: 25.1 %Lincoln County25.1Pettis County: 25.1 %Pettis County25.1Daviess County: 25 %Daviess County25Vernon County: 24.6 %Vernon County24.6Cedar County: 24.5 %Cedar County24.5Laclede County: 24.3 %Laclede County24.3Jasper County: 24.2 %Jasper County24.2Mercer County: 24.2 %Mercer County24.2Douglas County: 24.2 %Douglas County24.2Barton County: 24.1 %Barton County24.1Clark County: 24.1 %Clark County24.1Oregon County: 23.9 %Oregon County23.9Howell County: 23.9 %Howell County23.9Audrain County: 23.9 %Audrain County23.9Harrison County: 23.8 %Harrison County23.8Polk County: 23.8 %Polk County23.8Scott County: 23.8 %Scott County23.8Newton County: 23.8 %Newton County23.8Knox County: 23.8 %Knox County23.8Shannon County: 23.7 %Shannon County23.7Shelby County: 23.7 %Shelby County23.7Miller County: 23.6 %Miller County23.6New Madrid County: 23.6 %New Madrid County23.6Dallas County: 23.6 %Dallas County23.6Carter County: 23.5 %Carter County23.5Clay County: 23.5 %Clay County23.5Caldwell County: 23.4 %Caldwell County23.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2023 (%)Change on 2022
1Scotland County30.2+0.2 pts
2Schuyler County27.9+0.4 pts
3Webster County27.8-0.1 pts
4Gentry County26.3-0.2 pts
5Wright County26.3-0.1 pts
6Pemiscot County26.1-0.1 pts
7McDonald County25.8-0.2 pts
8Grundy County25.6-0.1 pts
9Lawrence County25.60 pts
10Christian County25.6-0.3 pts
11Moniteau County25.5-0.2 pts
12Dunklin County25.40 pts
13Ripley County25.3+0.5 pts
14Lincoln County25.1-0.2 pts
15Pettis County25.1-0 pts
16Daviess County25-0.5 pts
17Vernon County24.60 pts
18Cedar County24.5-0.3 pts
19Laclede County24.3-0.1 pts
20Jasper County24.2-0.2 pts
21Mercer County24.2+0.6 pts
22Douglas County24.2+0.6 pts
23Barton County24.1+0.1 pts
24Clark County24.1-0.3 pts
25Oregon County23.9+0.1 pts
26Howell County23.9-0.1 pts
27Audrain County23.9-0 pts
28Harrison County23.8+0.1 pts
29Polk County23.8-0.1 pts
30Scott County23.8-0.2 pts
31Newton County23.8-0 pts
32Knox County23.8-0.2 pts
33Shannon County23.7+0.3 pts
34Shelby County23.7-0.4 pts
35Miller County23.6-0.2 pts
36New Madrid County23.6-0.5 pts
37Dallas County23.6-0.4 pts
38Carter County23.5+0.2 pts
39Clay County23.5-0.3 pts
40Caldwell County23.40 pts
41Butler County23.3-0.2 pts
42Cass County23.2-0.4 pts
43Macon County23.2-0.1 pts
44Barry County23.2+0.1 pts
45Ray County23.1+0.1 pts
46Bates County23.1-0.2 pts
47Bollinger County23.1+0.4 pts
48Andrew County23.1-0.2 pts
49Platte County23-0.3 pts
50Linn County23-0.2 pts
51Washington County22.9+0.2 pts
52Clinton County22.90 pts
53Morgan County22.9-0.1 pts
54Sullivan County22.8-0.8 pts
55Lafayette County22.8-0.1 pts
56Marion County22.8-0.2 pts
57Johnson County22.7+0.2 pts
58Dent County22.70 pts
59Pike County22.7-0.3 pts
60Osage County22.7-0 pts
61Chariton County22.6+0.1 pts
62Putnam County22.6+0.2 pts
63Cooper County22.6-0.1 pts
64Warren County22.6-0.5 pts
65Pulaski County22.5-0.2 pts
66St. Charles County22.4-0.3 pts
67Jackson County22.4-0.2 pts
68Jefferson County22.4-0.2 pts
69Holt County22.30 pts
70Henry County22.3-0 pts
71Stoddard County22.3-0 pts
72Texas County22.3-0.2 pts
73Monroe County22.2+0.3 pts
74Madison County22.2-0.2 pts
75Perry County22.2-0.3 pts
76Iron County22.2+0.3 pts
77Buchanan County22.1-0.2 pts
78Crawford County22.1-0.1 pts
79St. Clair County220 pts
80Saline County22+0.2 pts
81Franklin County22-0.2 pts
82Randolph County21.9+0.3 pts
83Mississippi County21.9-0.2 pts
84St. Louis County21.6-0.2 pts
85Livingston County21.6+0.1 pts
86Cole County21.6-0.2 pts
87Howard County21.4-0.4 pts
88Maries County21.4-0.1 pts
89Ralls County21.3-0 pts
90Carroll County21.3-0 pts
91Ste. Genevieve County21.3+0.2 pts
92Montgomery County21.3-0.3 pts
93Callaway County21.3-0.1 pts
94DeKalb County21.1+2.5 pts
95Cape Girardeau County21-0.2 pts
96Dade County21-0.4 pts
97Atchison County20.9+0.1 pts
98Lewis County20.8-0.2 pts
99Phelps County20.8-0.1 pts
100St. Francois County20.6-0.4 pts
101Gasconade County20.5-0.3 pts
102Wayne County20.4-0 pts
103Boone County20.2-0.2 pts
104Greene County20.2-0.2 pts
105Reynolds County20.1-0.3 pts
106Taney County20.1-0.2 pts
107Worth County19.5+0.5 pts
108Ozark County19.1-0.3 pts
109Nodaway County19.1-0.3 pts
110Adair County19.1+0.3 pts
111Hickory County18.8+0.3 pts
112Benton County17.8-0.1 pts
113Camden County17.6-0.3 pts
114St. Louis city17.6-0.1 pts
115Stone County17.4+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 Missouri 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 Missouri 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/missouri-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 Missouri 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/missouri-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 Missouri 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/missouri-counties?period=2023 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_missouri_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 Missouri 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/missouri-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 Missouri 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/missouri-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/missouri-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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Rank Counties in Missouri by population under 18 using official data, and cite the source.
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Questions

Which county has the highest population under 18?

Scotland County, with 30.2% in 2023, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Stone County, with 17.4% 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 Missouri: more rankings