Data / Rankings / Population under 18 / Counties in Missouri

Counties in Missouri by population under 18, 2025

Scotland County had the highest population under 18 of 115 counties in 2025, at 30.6%. Stone County had the lowest, at 16.7%. The median was 22.3% and the figure for Missouri was 21.7%. Source: the U.S. Census Bureau.

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Highest30.6Scotland County
Lowest16.7Stone County
Median22.3115 counties
Missouri21.7History

Map of counties, 2025

Adair County: 19 %Andrew County: 22.6 %Atchison County: 21.5 %Audrain County: 23.3 %Barry County: 23.6 %Barton County: 23.5 %Bates County: 23 %Benton County: 17.5 %Bollinger County: 23.4 %Boone County: 19.7 %Buchanan County: 21.7 %Butler County: 22.8 %Caldwell County: 23 %Callaway County: 20.9 %Camden County: 17.1 %Cape Girardeau County: 20.8 %Carroll County: 21 %Carter County: 24.1 %Cass County: 22.5 %Cedar County: 24.1 %Chariton County: 22.3 %Christian County: 24.6 %Clark County: 23.6 %Clay County: 22.7 %Clinton County: 22.4 %Cole County: 21.2 %Cooper County: 21.6 %Crawford County: 21.7 %Dade County: 20.8 %Dallas County: 23.1 %Daviess County: 24.7 %DeKalb County: 20.6 %Dent County: 22.4 %Douglas County: 24.1 %Dunklin County: 25.7 %Franklin County: 21.4 %Gasconade County: 21 %Gentry County: 26.4 %Greene County: 19.7 %Grundy County: 25.7 %Harrison County: 23.4 %Henry County: 21.8 %Hickory County: 20.1 %Holt County: 22.2 %Howard County: 21.1 %Howell County: 23.4 %Iron County: 21.8 %Jackson County: 22.1 %Jasper County: 23.8 %Jefferson County: 21.6 %Johnson County: 22.6 %Knox County: 24 %Laclede County: 24.2 %Lafayette County: 22.5 %Lawrence County: 25.2 %Lewis County: 20.7 %Lincoln County: 24.5 %Linn County: 22.9 %Livingston County: 21.1 %McDonald County: 25.4 %Macon County: 22.9 %Madison County: 21.9 %Maries County: 20.7 %Marion County: 22.7 %Mercer County: 24.2 %Miller County: 23 %Mississippi County: 21.2 %Moniteau County: 24.9 %Monroe County: 21.9 %Montgomery County: 20.5 %Morgan County: 22.3 %New Madrid County: 23.3 %Newton County: 23.8 %Nodaway County: 19.5 %Oregon County: 23.9 %Osage County: 22.1 %Ozark County: 19.5 %Pemiscot County: 26.2 %Perry County: 21.5 %Pettis County: 24.9 %Phelps County: 20.3 %Pike County: 22.4 %Platte County: 22.3 %Polk County: 23.3 %Pulaski County: 22.3 %Putnam County: 23.2 %Ralls County: 20.5 %Randolph County: 21.4 %Ray County: 22.6 %Reynolds County: 19.4 %Ripley County: 26 %St. Charles County: 21.6 %St. Clair County: 22.3 %Ste. Genevieve County: 20.9 %St. Francois County: 20.2 %St. Louis County: 21.2 %Saline County: 21.7 %Schuyler County: 28.2 %Scotland County: 30.6 %Scott County: 23.6 %Shannon County: 24.3 %Shelby County: 23.7 %Stoddard County: 22.3 %Stone County: 16.7 %Sullivan County: 22.1 %Taney County: 20 %Texas County: 22.1 %Vernon County: 24.6 %Warren County: 21.9 %Washington County: 22.4 %Wayne County: 20.1 %Webster County: 27.3 %Worth County: 20.3 %Wright County: 25.8 %St. Louis city: 17.3 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 and over
%, 2025. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2025

Scotland County: 30.6 %Scotland County30.6Schuyler County: 28.2 %Schuyler County28.2Webster County: 27.3 %Webster County27.3Gentry County: 26.4 %Gentry County26.4Pemiscot County: 26.2 %Pemiscot County26.2Ripley County: 26 %Ripley County26Wright County: 25.8 %Wright County25.8Grundy County: 25.7 %Grundy County25.7Dunklin County: 25.7 %Dunklin County25.7McDonald County: 25.4 %McDonald County25.4Lawrence County: 25.2 %Lawrence County25.2Pettis County: 24.9 %Pettis County24.9Moniteau County: 24.9 %Moniteau County24.9Daviess County: 24.7 %Daviess County24.7Christian County: 24.6 %Christian County24.6Vernon County: 24.6 %Vernon County24.6Lincoln County: 24.5 %Lincoln County24.5Shannon County: 24.3 %Shannon County24.3Mercer County: 24.2 %Mercer County24.2Laclede County: 24.2 %Laclede County24.2Cedar County: 24.1 %Cedar County24.1Douglas County: 24.1 %Douglas County24.1Carter County: 24.1 %Carter County24.1Knox County: 24 %Knox County24Oregon County: 23.9 %Oregon County23.9Jasper County: 23.8 %Jasper County23.8Newton County: 23.8 %Newton County23.8Shelby County: 23.7 %Shelby County23.7Barry County: 23.6 %Barry County23.6Clark County: 23.6 %Clark County23.6Scott County: 23.6 %Scott County23.6Barton County: 23.5 %Barton County23.5Bollinger County: 23.4 %Bollinger County23.4Howell County: 23.4 %Howell County23.4Harrison County: 23.4 %Harrison County23.4Audrain County: 23.3 %Audrain County23.3Polk County: 23.3 %Polk County23.3New Madrid County: 23.3 %New Madrid County23.3Putnam County: 23.2 %Putnam County23.2Dallas County: 23.1 %Dallas County23.1Scotland County: 30.6 %Scotland County30.6Schuyler County: 28.2 %Schuyler County28.2Webster County: 27.3 %Webster County27.3Gentry County: 26.4 %Gentry County26.4Pemiscot County: 26.2 %Pemiscot County26.2Ripley County: 26 %Ripley County26Wright County: 25.8 %Wright County25.8Grundy County: 25.7 %Grundy County25.7Dunklin County: 25.7 %Dunklin County25.7McDonald County: 25.4 %McDonald County25.4Lawrence County: 25.2 %Lawrence County25.2Pettis County: 24.9 %Pettis County24.9Moniteau County: 24.9 %Moniteau County24.9Daviess County: 24.7 %Daviess County24.7Christian County: 24.6 %Christian County24.6Vernon County: 24.6 %Vernon County24.6Lincoln County: 24.5 %Lincoln County24.5Shannon County: 24.3 %Shannon County24.3Mercer County: 24.2 %Mercer County24.2Laclede County: 24.2 %Laclede County24.2Cedar County: 24.1 %Cedar County24.1Douglas County: 24.1 %Douglas County24.1Carter County: 24.1 %Carter County24.1Knox County: 24 %Knox County24Oregon County: 23.9 %Oregon County23.9Jasper County: 23.8 %Jasper County23.8Newton County: 23.8 %Newton County23.8Shelby County: 23.7 %Shelby County23.7Barry County: 23.6 %Barry County23.6Clark County: 23.6 %Clark County23.6Scott County: 23.6 %Scott County23.6Barton County: 23.5 %Barton County23.5Bollinger County: 23.4 %Bollinger County23.4Howell County: 23.4 %Howell County23.4Harrison County: 23.4 %Harrison County23.4Audrain County: 23.3 %Audrain County23.3Polk County: 23.3 %Polk County23.3New Madrid County: 23.3 %New Madrid County23.3Putnam County: 23.2 %Putnam County23.2Dallas County: 23.1 %Dallas County23.1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2025 (%)Change on 2024
1Scotland County30.6+0.2 pts
2Schuyler County28.2+0.4 pts
3Webster County27.3-0.3 pts
4Gentry County26.4+0.2 pts
5Pemiscot County26.2+0.1 pts
6Ripley County26+0.5 pts
7Wright County25.8-0.2 pts
8Grundy County25.7+0.1 pts
9Dunklin County25.7-0 pts
10McDonald County25.40 pts
11Lawrence County25.2-0.2 pts
12Pettis County24.9-0.1 pts
13Moniteau County24.9-0.2 pts
14Daviess County24.7+0.1 pts
15Christian County24.6-0.5 pts
16Vernon County24.6-0 pts
17Lincoln County24.5-0.3 pts
18Shannon County24.3-0 pts
19Mercer County24.2-0.5 pts
20Laclede County24.20 pts
21Cedar County24.1-0.6 pts
22Douglas County24.10 pts
23Carter County24.1+0.4 pts
24Knox County24+0.3 pts
25Oregon County23.9+0.3 pts
26Jasper County23.8-0.2 pts
27Newton County23.80 pts
28Shelby County23.7-0.3 pts
29Barry County23.6+0.2 pts
30Clark County23.6-0.4 pts
30Scott County23.6-0.2 pts
32Barton County23.5-0.3 pts
33Bollinger County23.4+0.3 pts
34Howell County23.4-0.2 pts
35Harrison County23.4-0.2 pts
36Audrain County23.3-0.3 pts
37Polk County23.3-0.3 pts
38New Madrid County23.3-0.2 pts
39Putnam County23.2+0.4 pts
40Dallas County23.1-0.3 pts
41Miller County23-0.3 pts
42Bates County23-0.1 pts
43Caldwell County23-0.3 pts
44Macon County22.9-0.1 pts
45Linn County22.9-0 pts
46Butler County22.8-0.3 pts
47Clay County22.7-0.4 pts
47Marion County22.7-0.1 pts
49Ray County22.6-0.3 pts
50Johnson County22.6-0 pts
51Andrew County22.6-0.3 pts
52Lafayette County22.5-0.1 pts
53Cass County22.5-0.4 pts
54Washington County22.4-0.3 pts
55Dent County22.4-0.2 pts
56Clinton County22.4-0.4 pts
57Pike County22.4-0.2 pts
58Stoddard County22.3-0.1 pts
59Chariton County22.3-0.1 pts
59Platte County22.3-0.3 pts
61Pulaski County22.3-0 pts
62Morgan County22.3-0.3 pts
63St. Clair County22.3-0 pts
64Holt County22.2+0.3 pts
65Osage County22.1-0.2 pts
66Jackson County22.1-0.2 pts
67Texas County22.1-0.1 pts
68Sullivan County22.1-0.1 pts
69Madison County21.9-0.1 pts
70Monroe County21.9+0.1 pts
71Warren County21.9-0.5 pts
72Iron County21.8-0.1 pts
73Henry County21.8-0.2 pts
74Saline County21.7-0.1 pts
75Crawford County21.7-0.1 pts
76Buchanan County21.7-0.4 pts
77St. Charles County21.6-0.4 pts
78Cooper County21.6-0.6 pts
79Jefferson County21.6-0.4 pts
80Atchison County21.5+0.4 pts
81Perry County21.5-0.6 pts
82Randolph County21.4-0 pts
83Franklin County21.4-0.3 pts
84St. Louis County21.2-0.2 pts
85Mississippi County21.2-0.5 pts
86Cole County21.2-0.2 pts
87Livingston County21.1-0.3 pts
88Howard County21.1-0.2 pts
89Carroll County21-0.2 pts
90Gasconade County21+0.3 pts
91Callaway County20.9-0.1 pts
92Ste. Genevieve County20.9-0.2 pts
93Cape Girardeau County20.8-0.1 pts
94Dade County20.8+0.4 pts
95Maries County20.7-0.6 pts
96Lewis County20.7-0.1 pts
97DeKalb County20.6-0.2 pts
98Ralls County20.5-0.4 pts
99Montgomery County20.5-0.7 pts
100Phelps County20.3-0.3 pts
101Worth County20.3+0.4 pts
102St. Francois County20.2-0.3 pts
103Wayne County20.1-0.1 pts
104Hickory County20.1+0.8 pts
105Taney County20-0.1 pts
106Boone County19.7-0.3 pts
107Greene County19.7-0.2 pts
108Ozark County19.5+0.3 pts
109Nodaway County19.5+0.2 pts
110Reynolds County19.4-0.3 pts
111Adair County19-0.2 pts
112Benton County17.5-0.1 pts
113St. Louis city17.3-0.1 pts
114Camden County17.1-0.3 pts
115Stone County16.7-0.4 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 Missouri by population under 18, 2025) [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, 2025. 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. 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, 2025. 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.

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, 2025 [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 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_missouri_by_2025,
  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, 2025}},
  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. 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, 2025
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
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/missouri-counties.
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?

Scotland County, with 30.6% in 2025, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Stone County, with 16.7% in 2025.

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