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 2024, at 30.4%. Stone County had the lowest, at 17.2%. The median was 22.6% and the figure for Missouri was 21.9%. Source: the U.S. Census Bureau.

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Highest30.4Scotland County
Lowest17.2Stone County
Median22.6115 counties
Missouri21.9History

Map of counties, 2024

Adair County: 19.2 %Andrew County: 22.8 %Atchison County: 21.1 %Audrain County: 23.7 %Barry County: 23.4 %Barton County: 23.7 %Bates County: 23 %Benton County: 17.6 %Bollinger County: 23.1 %Boone County: 20 %Buchanan County: 22 %Butler County: 23.1 %Caldwell County: 23.2 %Callaway County: 21 %Camden County: 17.4 %Cape Girardeau County: 20.9 %Carroll County: 21.3 %Carter County: 23.7 %Cass County: 22.8 %Cedar County: 24.7 %Chariton County: 22.4 %Christian County: 25.1 %Clark County: 23.9 %Clay County: 23.1 %Clinton County: 22.8 %Cole County: 21.4 %Cooper County: 22.2 %Crawford County: 21.8 %Dade County: 20.3 %Dallas County: 23.4 %Daviess County: 24.6 %DeKalb County: 20.8 %Dent County: 22.6 %Douglas County: 24.1 %Dunklin County: 25.7 %Franklin County: 21.8 %Gasconade County: 20.6 %Gentry County: 26.2 %Greene County: 19.9 %Grundy County: 25.6 %Harrison County: 23.6 %Henry County: 22 %Hickory County: 19.3 %Holt County: 21.9 %Howard County: 21.2 %Howell County: 23.6 %Iron County: 21.9 %Jackson County: 22.3 %Jasper County: 24.1 %Jefferson County: 22 %Johnson County: 22.6 %Knox County: 23.7 %Laclede County: 24.2 %Lafayette County: 22.6 %Lawrence County: 25.5 %Lewis County: 20.8 %Lincoln County: 24.8 %Linn County: 22.9 %Livingston County: 21.4 %McDonald County: 25.4 %Macon County: 23 %Madison County: 22 %Maries County: 21.3 %Marion County: 22.8 %Mercer County: 24.8 %Miller County: 23.3 %Mississippi County: 21.7 %Moniteau County: 25.2 %Monroe County: 21.8 %Montgomery County: 21.1 %Morgan County: 22.6 %New Madrid County: 23.4 %Newton County: 23.8 %Nodaway County: 19.2 %Oregon County: 23.6 %Osage County: 22.4 %Ozark County: 19.2 %Pemiscot County: 26.1 %Perry County: 22 %Pettis County: 25 %Phelps County: 20.6 %Pike County: 22.6 %Platte County: 22.6 %Polk County: 23.6 %Pulaski County: 22.3 %Putnam County: 22.8 %Ralls County: 20.9 %Randolph County: 21.5 %Ray County: 22.9 %Reynolds County: 19.7 %Ripley County: 25.4 %St. Charles County: 22 %St. Clair County: 22.3 %Ste. Genevieve County: 21.1 %St. Francois County: 20.5 %St. Louis County: 21.5 %Saline County: 21.9 %Schuyler County: 27.9 %Scotland County: 30.4 %Scott County: 23.8 %Shannon County: 24.3 %Shelby County: 24.1 %Stoddard County: 22.4 %Stone County: 17.2 %Sullivan County: 22.2 %Taney County: 20.1 %Texas County: 22.2 %Vernon County: 24.6 %Warren County: 22.3 %Washington County: 22.7 %Wayne County: 20.2 %Webster County: 27.6 %Worth County: 19.9 %Wright County: 26 %St. Louis city: 17.4 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 and over
%, 2024. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2024

Scotland County: 30.4 %Scotland County30.4Schuyler County: 27.9 %Schuyler County27.9Webster County: 27.6 %Webster County27.6Gentry County: 26.2 %Gentry County26.2Pemiscot County: 26.1 %Pemiscot County26.1Wright County: 26 %Wright County26Dunklin County: 25.7 %Dunklin County25.7Grundy County: 25.6 %Grundy County25.6Lawrence County: 25.5 %Lawrence County25.5Ripley County: 25.4 %Ripley County25.4McDonald County: 25.4 %McDonald County25.4Moniteau County: 25.2 %Moniteau County25.2Christian County: 25.1 %Christian County25.1Pettis County: 25 %Pettis County25Lincoln County: 24.8 %Lincoln County24.8Mercer County: 24.8 %Mercer County24.8Cedar County: 24.7 %Cedar County24.7Daviess County: 24.6 %Daviess County24.6Vernon County: 24.6 %Vernon County24.6Shannon County: 24.3 %Shannon County24.3Laclede County: 24.2 %Laclede County24.2Douglas County: 24.1 %Douglas County24.1Jasper County: 24.1 %Jasper County24.1Shelby County: 24.1 %Shelby County24.1Clark County: 23.9 %Clark County23.9Newton County: 23.8 %Newton County23.8Scott County: 23.8 %Scott County23.8Barton County: 23.7 %Barton County23.7Carter County: 23.7 %Carter County23.7Audrain County: 23.7 %Audrain County23.7Knox County: 23.7 %Knox County23.7Oregon County: 23.6 %Oregon County23.6Harrison County: 23.6 %Harrison County23.6Howell County: 23.6 %Howell County23.6Polk County: 23.6 %Polk County23.6New Madrid County: 23.4 %New Madrid County23.4Dallas County: 23.4 %Dallas County23.4Barry County: 23.4 %Barry County23.4Miller County: 23.3 %Miller County23.3Caldwell County: 23.2 %Caldwell County23.2Scotland County: 30.4 %Scotland County30.4Schuyler County: 27.9 %Schuyler County27.9Webster County: 27.6 %Webster County27.6Gentry County: 26.2 %Gentry County26.2Pemiscot County: 26.1 %Pemiscot County26.1Wright County: 26 %Wright County26Dunklin County: 25.7 %Dunklin County25.7Grundy County: 25.6 %Grundy County25.6Lawrence County: 25.5 %Lawrence County25.5Ripley County: 25.4 %Ripley County25.4McDonald County: 25.4 %McDonald County25.4Moniteau County: 25.2 %Moniteau County25.2Christian County: 25.1 %Christian County25.1Pettis County: 25 %Pettis County25Lincoln County: 24.8 %Lincoln County24.8Mercer County: 24.8 %Mercer County24.8Cedar County: 24.7 %Cedar County24.7Daviess County: 24.6 %Daviess County24.6Vernon County: 24.6 %Vernon County24.6Shannon County: 24.3 %Shannon County24.3Laclede County: 24.2 %Laclede County24.2Douglas County: 24.1 %Douglas County24.1Jasper County: 24.1 %Jasper County24.1Shelby County: 24.1 %Shelby County24.1Clark County: 23.9 %Clark County23.9Newton County: 23.8 %Newton County23.8Scott County: 23.8 %Scott County23.8Barton County: 23.7 %Barton County23.7Carter County: 23.7 %Carter County23.7Audrain County: 23.7 %Audrain County23.7Knox County: 23.7 %Knox County23.7Oregon County: 23.6 %Oregon County23.6Harrison County: 23.6 %Harrison County23.6Howell County: 23.6 %Howell County23.6Polk County: 23.6 %Polk County23.6New Madrid County: 23.4 %New Madrid County23.4Dallas County: 23.4 %Dallas County23.4Barry County: 23.4 %Barry County23.4Miller County: 23.3 %Miller County23.3Caldwell County: 23.2 %Caldwell County23.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Scotland County30.4+0.2 pts
2Schuyler County27.9-0 pts
3Webster County27.6-0.2 pts
4Gentry County26.2-0.1 pts
5Pemiscot County26.10 pts
6Wright County26-0.3 pts
7Dunklin County25.7+0.3 pts
8Grundy County25.6-0 pts
9Lawrence County25.5-0.1 pts
10Ripley County25.4+0.2 pts
11McDonald County25.4-0.4 pts
12Moniteau County25.2-0.3 pts
13Christian County25.1-0.4 pts
14Pettis County25-0.1 pts
15Lincoln County24.8-0.3 pts
16Mercer County24.8+0.5 pts
17Cedar County24.7+0.2 pts
18Daviess County24.6-0.3 pts
19Vernon County24.6-0.1 pts
20Shannon County24.3+0.6 pts
21Laclede County24.2-0.1 pts
22Douglas County24.1-0.1 pts
23Jasper County24.1-0.2 pts
24Shelby County24.1+0.4 pts
25Clark County23.9-0.2 pts
26Newton County23.8-0 pts
27Scott County23.8-0.1 pts
28Barton County23.7-0.4 pts
29Carter County23.7+0.1 pts
30Audrain County23.7-0.2 pts
31Knox County23.7-0.1 pts
32Oregon County23.6-0.3 pts
33Harrison County23.6-0.2 pts
34Howell County23.6-0.3 pts
35Polk County23.6-0.3 pts
36New Madrid County23.4-0.1 pts
37Dallas County23.4-0.2 pts
38Barry County23.4+0.2 pts
39Miller County23.3-0.3 pts
40Caldwell County23.2-0.2 pts
41Butler County23.1-0.2 pts
42Clay County23.1-0.4 pts
43Bollinger County23.1-0 pts
44Bates County23-0 pts
45Macon County23-0.2 pts
46Ray County22.9-0.2 pts
47Linn County22.9-0.1 pts
48Andrew County22.8-0.2 pts
49Cass County22.8-0.4 pts
50Marion County22.8-0 pts
51Clinton County22.8-0.1 pts
52Putnam County22.8+0.1 pts
53Washington County22.7-0.2 pts
54Johnson County22.6-0.1 pts
55Dent County22.6-0.1 pts
56Platte County22.6-0.4 pts
57Morgan County22.6-0.3 pts
58Pike County22.6-0.1 pts
59Lafayette County22.6-0.2 pts
60Stoddard County22.4+0.1 pts
61Chariton County22.4-0.3 pts
62Osage County22.4-0.3 pts
63Warren County22.3-0.2 pts
64Pulaski County22.3-0.2 pts
65Jackson County22.3-0.1 pts
66St. Clair County22.3+0.3 pts
67Sullivan County22.2-0.6 pts
68Cooper County22.2-0.4 pts
69Texas County22.2-0.1 pts
70Buchanan County22-0.1 pts
71Madison County22-0.2 pts
72Perry County22-0.2 pts
73Henry County22-0.3 pts
74St. Charles County22-0.4 pts
75Jefferson County22-0.4 pts
76Holt County21.9-0.4 pts
77Saline County21.9-0.1 pts
78Iron County21.9-0.3 pts
79Monroe County21.8-0.4 pts
80Crawford County21.8-0.3 pts
81Franklin County21.8-0.2 pts
82Mississippi County21.7-0.2 pts
83Randolph County21.5-0.5 pts
84St. Louis County21.5-0.2 pts
85Livingston County21.4-0.2 pts
86Cole County21.4-0.2 pts
87Maries County21.3-0 pts
88Carroll County21.3-0 pts
89Howard County21.2-0.2 pts
90Montgomery County21.1-0.1 pts
91Atchison County21.1+0.2 pts
92Ste. Genevieve County21.1-0.2 pts
93Callaway County21-0.2 pts
94Cape Girardeau County20.9-0.1 pts
95Ralls County20.9-0.5 pts
96DeKalb County20.8-0.4 pts
97Lewis County20.8-0.1 pts
98Phelps County20.6-0.1 pts
99Gasconade County20.6+0.1 pts
100St. Francois County20.5-0.1 pts
101Dade County20.3-0.7 pts
102Wayne County20.2-0.2 pts
103Taney County20.1-0 pts
104Boone County20-0.3 pts
105Worth County19.9+0.4 pts
106Greene County19.9-0.3 pts
107Reynolds County19.7-0.5 pts
108Hickory County19.3+0.5 pts
109Adair County19.2+0.1 pts
110Nodaway County19.2+0.1 pts
111Ozark County19.2+0.1 pts
112Benton County17.6-0.2 pts
113Camden County17.4-0.1 pts
114St. Louis city17.4-0.1 pts
115Stone County17.2-0.2 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, 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 Missouri 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/missouri-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 Missouri 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/missouri-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 Missouri 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/missouri-counties?period=2024 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_missouri_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 Missouri 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/missouri-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 Missouri 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/missouri-counties?period=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/missouri-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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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 30.4% in 2024, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Stone County, with 17.2% 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 Missouri: more rankings