| Rank |
County |
Percentage of Seniors |
| 1 |
McPherson County, South Dakota
|
29.6%
|
| 2 |
Potter County, South Dakota
|
26.0%
|
| 3 |
Campbell County, South Dakota
|
25.6%
|
| 4 |
Hand County, South Dakota
|
25.5%
|
| 5 |
Jerauld County, South Dakota
|
24.8%
|
| 6 |
Fall River County, South Dakota
|
24.5%
|
| 7 |
Douglas County, South Dakota
|
24.4%
|
| 8 |
Hutchinson County, South Dakota
|
24.2%
|
| 9 |
Walworth County, South Dakota
|
24.1%
|
| 10 |
Gregory County, South Dakota
|
24.0%
|
| 11 |
Day County, South Dakota
|
23.7%
|
| 12 |
Faulk County, South Dakota
|
23.3%
|
| 13 |
Custer County, South Dakota
|
23.2%
|
| 14 |
Perkins County, South Dakota
|
22.8%
|
| 15 |
Hyde County, South Dakota
|
22.4%
|
| 16 |
Jones County, South Dakota
|
21.9%
|
| 17 |
Haakon County, South Dakota
|
21.8%
|
| 18 |
Clark County, South Dakota
|
21.7%
|
| 19 |
Tripp County, South Dakota
|
21.6%
|
| 20 |
Edmunds County, South Dakota
|
21.5%
|
| 21 |
Miner County, South Dakota
|
21.4%
|
| 22 |
Kingsbury County, South Dakota
|
20.7%
|
| 23 |
Deuel County, South Dakota
|
20.0%
|
| 24 |
Aurora County, South Dakota
|
20.0%
|
| 25 |
Marshall County, South Dakota
|
19.8%
|
| 26 |
Grant County, South Dakota
|
19.6%
|
| 27 |
Bon Homme County, South Dakota
|
19.6%
|
| 28 |
Sanborn County, South Dakota
|
19.6%
|
| 29 |
Turner County, South Dakota
|
19.4%
|
| 30 |
Spink County, South Dakota
|
19.3%
|
| 31 |
McCook County, South Dakota
|
19.1%
|
| 32 |
Sully County, South Dakota
|
18.9%
|
| 33 |
Lake County, South Dakota
|
18.1%
|
| 34 |
Charles Mix County, South Dakota
|
17.7%
|
| 35 |
Roberts County, South Dakota
|
17.7%
|
| 36 |
Davison County, South Dakota
|
17.1%
|
| 37 |
Brule County, South Dakota
|
17.1%
|
| 38 |
Hamlin County, South Dakota
|
17.1%
|
| 39 |
Lawrence County, South Dakota
|
17.1%
|
| 40 |
Beadle County, South Dakota
|
17.0%
|
| 41 |
Butte County, South Dakota
|
17.0%
|
| 42 |
Yankton County, South Dakota
|
16.5%
|
| 43 |
Stanley County, South Dakota
|
16.4%
|
| 44 |
Moody County, South Dakota
|
16.1%
|
| 45 |
Brown County, South Dakota
|
15.9%
|
| 46 |
Harding County, South Dakota
|
15.2%
|
| 47 |
Codington County, South Dakota
|
15.0%
|
| 48 |
Mellette County, South Dakota
|
15.0%
|
| 49 |
Lyman County, South Dakota
|
14.9%
|
| 50 |
Union County, South Dakota
|
14.4%
|
| 51 |
Pennington County, South Dakota
|
14.3%
|
| 52 |
Hughes County, South Dakota
|
14.1%
|
| 53 |
Hanson County, South Dakota
|
13.8%
|
| 54 |
Jackson County, South Dakota
|
13.3%
|
| 55 |
Meade County, South Dakota
|
12.8%
|
| 56 |
Bennett County, South Dakota
|
11.7%
|
| 57 |
Minnehaha County, South Dakota
|
11.6%
|
| 58 |
Corson County, South Dakota
|
10.9%
|
| 59 |
Clay County, South Dakota
|
10.5%
|
| 60 |
Brookings County, South Dakota
|
10.0%
|
| 61 |
Dewey County, South Dakota
|
9.8%
|
| 62 |
Lincoln County, South Dakota
|
9.4%
|
| 63 |
Buffalo County, South Dakota
|
7.5%
|
| 64 |
Ziebach County, South Dakota
|
7.1%
|
| 65 |
Todd County, South Dakota
|
6.7%
|
| 66 |
Shannon County, South Dakota
|
6.4%
|