Ranking of South Dakota Counties By 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 population of South Dakota (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 43,328. Among all South Dakota counties, Minnehaha County had the highest population (aged 25 years and above) with an educational attainment of Less than High School Diploma (8,766), followed by Pennington County (4,142), and Oglala Lakota County (1,922).
The chart below shows the top 10 South Dakota counties, and the table below shows the ranking of all South Dakota 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: South Dakota ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of South Dakota Counties By Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | Minnehaha County | 8766 |
| 2 | Pennington County | 4142 |
| 3 | Oglala Lakota County | 1922 |
| 4 | Beadle County | 1770 |
| 5 | Brown County | 1717 |
| 6 | Lincoln County | 1708 |
| 7 | Codington County | 1620 |
| 8 | Yankton County | 1373 |
| 9 | Davison County | 1358 |
| 10 | Lawrence County | 1011 |
| 11 | Todd County | 984 |
| 12 | Meade County | 889 |
| 13 | Brookings County | 692 |
| 14 | Lake County | 680 |
| 15 | Charles Mix County | 673 |
| 16 | Roberts County | 662 |
| 17 | Union County | 626 |
| 18 | Butte County | 608 |
| 19 | Bon Homme County | 581 |
| 20 | Turner County | 502 |
| 21 | Dewey County | 481 |
| 22 | Hutchinson County | 475 |
| 23 | Custer County | 469 |
| 24 | Tripp County | 468 |
| 25 | Hughes County | 457 |
| 26 | Spink County | 439 |
| 27 | Grant County | 420 |
| 28 | Brule County | 416 |
| 29 | Walworth County | 379 |
| 30 | Clay County | 375 |
| 31 | Fall River County | 352 |
| 32 | McCook County | 324 |
| 33 | Day County | 314 |
| 34 | Corson County | 302 |
| 35 | Hamlin County | 284 |
| 36 | Kingsbury County | 281 |
| 37 | Gregory County | 267 |
| 38 | Marshall County | 264 |
| 39 | Moody County | 252 |
| 40 | Deuel County | 250 |
| 41 | Jackson County | 238 |
| 42 | McPherson County | 231 |
| 43 | Mellette County | 225 |
| 44 | Bennett County | 206 |
| 45 | Edmunds County | 205 |
| 46 | Lyman County | 204 |
| 47 | Douglas County | 189 |
| 48 | Buffalo County | 188 |
| 49 | Miner County | 178 |
| 50 | Perkins County | 172 |
| 51 | Aurora County | 171 |
| 52 | Ziebach County | 162 |
| 53 | Hand County | 154 |
| 54 | Clark County | 152 |
| 55 | Campbell County | 135 |
| 56 | Stanley County | 133 |
| 57 | Sanborn County | 129 |
| 58 | Faulk County | 124 |
| 59 | Potter County | 110 |
| 60 | Jerauld County | 108 |
| 61 | Hanson County | 103 |
| 62 | Hyde County | 87 |
| 63 | Haakon County | 55 |
| 64 | Harding County | 44 |
| 65 | Jones County | 38 |
| 66 | Sully County | 34 |