Ranking of Missouri Counties By Percentage of Population Aged 25 years and above with an Educational attainment of Less than High School Diploma in 2021 (ACS-5Yrs)
Updated on September 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the percentage of the population of Missouri (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 9.02%. Among all Missouri counties, Reynolds County had the highest percentage of its population (aged 25 years and above) with an educational attainment of Less than High School Diploma (22.17%), followed by McDonald County (21.83%), and Morgan County (20.89%).
The chart below shows the top 10 Missouri counties, and the table below shows the ranking of all Missouri counties.
You can see similar information for other educational attainments.
You can also see similar information for other states and for the United States.
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Related Topics: Missouri ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Missouri Counties By Percentage of Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
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| Rank | County | Percentage of Population (Aged 25yrs+) (%) |
|---|---|---|
| 1 | Reynolds County | 22.17 |
| 2 | McDonald County | 21.83 |
| 3 | Morgan County | 20.89 |
| 4 | Dunklin County | 20.80 |
| 5 | Scotland County | 20.57 |
| 6 | Pemiscot County | 20.20 |
| 7 | Mississippi County | 20.19 |
| 8 | Washington County | 19.51 |
| 9 | Stoddard County | 18.91 |
| 10 | Crawford County | 18.90 |
| 11 | Ozark County | 18.45 |
| 12 | Ripley County | 18.23 |
| 12 | Wayne County | 18.23 |
| 13 | New Madrid County | 17.72 |
| 14 | Iron County | 17.32 |
| 15 | Wright County | 17.03 |
| 16 | Oregon County | 16.64 |
| 17 | Douglas County | 16.25 |
| 18 | Dent County | 16.15 |
| 19 | Butler County | 15.81 |
| 20 | Grundy County | 15.55 |
| 21 | Bollinger County | 15.13 |
| 22 | Lawrence County | 14.97 |
| 23 | Sullivan County | 14.95 |
| 24 | Barry County | 14.89 |
| 25 | Texas County | 14.86 |
| 26 | Lewis County | 14.61 |
| 27 | Moniteau County | 14.42 |
| 27 | Scott County | 14.42 |
| 28 | Shannon County | 14.24 |
| 29 | Montgomery County | 14.16 |
| 30 | Howell County | 14.15 |
| 31 | Maries County | 14.13 |
| 32 | St. Francois County | 14.03 |
| 33 | Gentry County | 13.97 |
| 34 | Cedar County | 13.84 |
| 35 | Perry County | 13.80 |
| 36 | Clark County | 13.58 |
| 37 | Laclede County | 13.47 |
| 38 | Knox County | 13.30 |
| 39 | Dallas County | 13.16 |
| 40 | Benton County | 13.05 |
| 41 | Carter County | 13.04 |
| 42 | Pike County | 12.94 |
| 43 | Saline County | 12.91 |
| 44 | Daviess County | 12.83 |
| 45 | Audrain County | 12.72 |
| 46 | Webster County | 12.68 |
| 47 | Pettis County | 12.61 |
| 48 | Mercer County | 12.51 |
| 49 | Madison County | 12.47 |
| 50 | Jasper County | 12.39 |
| 51 | Barton County | 12.33 |
| 52 | Howard County | 12.10 |
| 53 | Warren County | 12.05 |
| 54 | Bates County | 11.94 |
| 55 | St. Clair County | 11.92 |
| 56 | Livingston County | 11.77 |
| 57 | Gasconade County | 11.66 |
| 58 | Henry County | 11.41 |
| 59 | Shelby County | 11.30 |
| 60 | Randolph County | 11.01 |
| 61 | Miller County | 11.00 |
| 62 | Hickory County | 10.87 |
| 63 | Callaway County | 10.85 |
| 64 | Caldwell County | 10.77 |
| 64 | Dade County | 10.77 |
| 65 | Newton County | 10.76 |
| 65 | Polk County | 10.76 |
| 66 | St. Louis city | 10.75 |
| 67 | Cooper County | 10.71 |
| 68 | Vernon County | 10.66 |
| 69 | Ray County | 10.63 |
| 70 | Buchanan County | 10.48 |
| 71 | DeKalb County | 10.43 |
| 72 | Marion County | 10.39 |
| 73 | Schuyler County | 10.32 |
| 74 | Linn County | 10.09 |
| 75 | Franklin County | 10.05 |
| 76 | Atchison County | 9.96 |
| 77 | Stone County | 9.95 |
| 78 | Taney County | 9.93 |
| 79 | Macon County | 9.66 |
| 80 | Carroll County | 9.63 |
| 81 | Lafayette County | 9.58 |
| 82 | Ralls County | 9.55 |
| 83 | Phelps County | 9.40 |
| 84 | Jefferson County | 9.26 |
| 85 | Lincoln County | 9.15 |
| 85 | Monroe County | 9.15 |
| 86 | Chariton County | 8.65 |
| 86 | Harrison County | 8.65 |
| 87 | Camden County | 8.63 |
| 87 | Jackson County | 8.63 |
| 88 | Worth County | 8.61 |
| 89 | Ste. Genevieve County | 8.60 |
| 90 | Osage County | 8.15 |
| 91 | Cape Girardeau County | 8.14 |
| 92 | Adair County | 8.10 |
| 93 | Christian County | 7.50 |
| 94 | Cole County | 7.44 |
| 95 | Greene County | 7.10 |
| 96 | Johnson County | 7.05 |
| 97 | Cass County | 6.67 |
| 98 | Clinton County | 6.66 |
| 99 | Andrew County | 6.50 |
| 100 | Clay County | 6.45 |
| 101 | Nodaway County | 6.05 |
| 102 | St. Louis County | 5.90 |
| 103 | Holt County | 5.84 |
| 104 | Putnam County | 5.61 |
| 105 | Pulaski County | 5.56 |
| 106 | Boone County | 5.00 |
| 107 | St. Charles County | 4.62 |
| 108 | Platte County | 3.37 |