# Counties in Missouri by population under 18, 2025

All 115 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population_0_17_share`
- Unit: %
- Definition: 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.
- Source: 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: 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.
- Web page: https://invokely.ai/rankings/population-under-18/missouri-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Scotland County | 30.6 |
| 2 | Schuyler County | 28.2 |
| 3 | Webster County | 27.3 |
| 4 | Gentry County | 26.4 |
| 5 | Pemiscot County | 26.2 |
| 6 | Ripley County | 26 |
| 7 | Wright County | 25.8 |
| 8 | Grundy County | 25.7 |
| 9 | Dunklin County | 25.7 |
| 10 | McDonald County | 25.4 |
| 11 | Lawrence County | 25.2 |
| 12 | Pettis County | 24.9 |
| 13 | Moniteau County | 24.9 |
| 14 | Daviess County | 24.7 |
| 15 | Christian County | 24.6 |
| 16 | Vernon County | 24.6 |
| 17 | Lincoln County | 24.5 |
| 18 | Shannon County | 24.3 |
| 19 | Mercer County | 24.2 |
| 20 | Laclede County | 24.2 |
| 21 | Cedar County | 24.1 |
| 22 | Douglas County | 24.1 |
| 23 | Carter County | 24.1 |
| 24 | Knox County | 24 |
| 25 | Oregon County | 23.9 |
| 26 | Jasper County | 23.8 |
| 27 | Newton County | 23.8 |
| 28 | Shelby County | 23.7 |
| 29 | Barry County | 23.6 |
| 30 | Clark County | 23.6 |
| 30 | Scott County | 23.6 |
| 32 | Barton County | 23.5 |
| 33 | Bollinger County | 23.4 |
| 34 | Howell County | 23.4 |
| 35 | Harrison County | 23.4 |
| 36 | Audrain County | 23.3 |
| 37 | Polk County | 23.3 |
| 38 | New Madrid County | 23.3 |
| 39 | Putnam County | 23.2 |
| 40 | Dallas County | 23.1 |
| 41 | Miller County | 23 |
| 42 | Bates County | 23 |
| 43 | Caldwell County | 23 |
| 44 | Macon County | 22.9 |
| 45 | Linn County | 22.9 |
| 46 | Butler County | 22.8 |
| 47 | Clay County | 22.7 |
| 47 | Marion County | 22.7 |
| 49 | Ray County | 22.6 |
| 50 | Johnson County | 22.6 |
| 51 | Andrew County | 22.6 |
| 52 | Lafayette County | 22.5 |
| 53 | Cass County | 22.5 |
| 54 | Washington County | 22.4 |
| 55 | Dent County | 22.4 |
| 56 | Clinton County | 22.4 |
| 57 | Pike County | 22.4 |
| 58 | Stoddard County | 22.3 |
| 59 | Chariton County | 22.3 |
| 59 | Platte County | 22.3 |
| 61 | Pulaski County | 22.3 |
| 62 | Morgan County | 22.3 |
| 63 | St. Clair County | 22.3 |
| 64 | Holt County | 22.2 |
| 65 | Osage County | 22.1 |
| 66 | Jackson County | 22.1 |
| 67 | Texas County | 22.1 |
| 68 | Sullivan County | 22.1 |
| 69 | Madison County | 21.9 |
| 70 | Monroe County | 21.9 |
| 71 | Warren County | 21.9 |
| 72 | Iron County | 21.8 |
| 73 | Henry County | 21.8 |
| 74 | Saline County | 21.7 |
| 75 | Crawford County | 21.7 |
| 76 | Buchanan County | 21.7 |
| 77 | St. Charles County | 21.6 |
| 78 | Cooper County | 21.6 |
| 79 | Jefferson County | 21.6 |
| 80 | Atchison County | 21.5 |
| 81 | Perry County | 21.5 |
| 82 | Randolph County | 21.4 |
| 83 | Franklin County | 21.4 |
| 84 | St. Louis County | 21.2 |
| 85 | Mississippi County | 21.2 |
| 86 | Cole County | 21.2 |
| 87 | Livingston County | 21.1 |
| 88 | Howard County | 21.1 |
| 89 | Carroll County | 21 |
| 90 | Gasconade County | 21 |
| 91 | Callaway County | 20.9 |
| 92 | Ste. Genevieve County | 20.9 |
| 93 | Cape Girardeau County | 20.8 |
| 94 | Dade County | 20.8 |
| 95 | Maries County | 20.7 |
| 96 | Lewis County | 20.7 |
| 97 | DeKalb County | 20.6 |
| 98 | Ralls County | 20.5 |
| 99 | Montgomery County | 20.5 |
| 100 | Phelps County | 20.3 |
| 101 | Worth County | 20.3 |
| 102 | St. Francois County | 20.2 |
| 103 | Wayne County | 20.1 |
| 104 | Hickory County | 20.1 |
| 105 | Taney County | 20 |
| 106 | Boone County | 19.7 |
| 107 | Greene County | 19.7 |
| 108 | Ozark County | 19.5 |
| 109 | Nodaway County | 19.5 |
| 110 | Reynolds County | 19.4 |
| 111 | Adair County | 19 |
| 112 | Benton County | 17.5 |
| 113 | St. Louis city | 17.3 |
| 114 | Camden County | 17.1 |
| 115 | Stone County | 16.7 |