| State | County | Pop. | Density | Voted | % Dem. | % Rep. | Win |
|---|---|---|---|---|---|---|---|
| South Dakota | butte county | 10429 | 1.78961 | 4802 | 0.195544% | 0.776968% | Republican |
| South Dakota | campbell county | 1376 | 0.724131 | 873 | 0.134021% | 0.85567% | Republican |
| South Dakota | charles mix county | 9292 | 3.26898 | 3783 | 0.311129% | 0.674597% | Republican |
| South Dakota | clark county | 3736 | 1.50634 | 1850 | 0.236216% | 0.742162% | Republican |
| South Dakota | clay county | 14070 | 13.1847 | 5698 | 0.541067% | 0.431028% | Democrat |
| South Dakota | codington county | 28009 | 15.728 | 13161 | 0.291543% | 0.680647% | Republican |
| South Dakota | corson county | 4086 | 0.638789 | 1283 | 0.484801% | 0.504287% | Republican |
| South Dakota | custer county | 8972 | 2.22494 | 5494 | 0.277029% | 0.701128% | Republican |
| South Dakota | davison county | 19775 | 17.532 | 8454 | 0.313224% | 0.663946% | Republican |
| South Dakota | day county | 5424 | 2.03744 | 2964 | 0.354926% | 0.630567% | Republican |
| South Dakota | deuel county | 4351 | 2.69786 | 2350 | 0.259149% | 0.722979% | Republican |
| South Dakota | dewey county | 5892 | 0.988022 | 1966 | 0.57528% | 0.401831% | Democrat |
| South Dakota | douglas county | 2921 | 2.61186 | 1707 | 0.126538% | 0.859988% | Republican |
| South Dakota | edmunds county | 3829 | 1.313 | 1985 | 0.210076% | 0.774811% | Republican |
| South Dakota | fall river county | 6713 | 1.48972 | 4042 | 0.260515% | 0.712024% | Republican |