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.

Ranking of South Dakota Counties By Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
Minnehaha County
Pennington County
Oglala Lakota County
Beadle County
Brown County
Lincoln County
Codington County
Yankton County
Davison County
Lawrence County
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