| State | County | Pop. | Density | Voted | % Dem. | % Rep. | Win |
|---|---|---|---|---|---|---|---|
| South Dakota | lake county | 12797 | 8.77775 | 5873 | 0.35212% | 0.626767% | Republican |
| South Dakota | lawrence county | 25844 | 12.4722 | 13828 | 0.328102% | 0.632991% | Republican |
| South Dakota | lincoln county | 61128 | 40.8834 | 32396 | 0.36983% | 0.605538% | Republican |
| South Dakota | lyman county | 3781 | 0.88899 | 1597 | 0.328741% | 0.652473% | Republican |
| South Dakota | marshall county | 4935 | 2.27353 | 2178 | 0.393939% | 0.590909% | Republican |
| South Dakota | mccook county | 5586 | 3.7561 | 2900 | 0.265172% | 0.713103% | Republican |
| South Dakota | mcpherson county | 2379 | 0.808114 | 1324 | 0.167674% | 0.811934% | Republican |
| South Dakota | meade county | 28332 | 3.1516 | 13670 | 0.240307% | 0.722385% | Republican |
| South Dakota | mellette county | 2061 | 0.60869 | 769 | 0.387516% | 0.583875% | Republican |
| South Dakota | miner county | 2216 | 1.50045 | 1138 | 0.281195% | 0.691564% | Republican |
| South Dakota | minnehaha county | 193134 | 92.4223 | 92326 | 0.438468% | 0.533425% | Republican |
| South Dakota | moody county | 6576 | 4.88849 | 3206 | 0.367748% | 0.608546% | Republican |
| South Dakota | oglala lakota county | 14177 | 2.61452 | 3200 | 0.884063% | 0.0928125% | Democrat |
| South Dakota | pennington county | 113775 | 15.8201 | 57518 | 0.358253% | 0.6096% | Republican |
| South Dakota | perkins county | 2865 | 0.385366 | 1669 | 0.1432% | 0.839425% | Republican |