- RMike Rounds ✓184,57160.5%
- IBrian Bengs120,48439.5%
R win (hold)
D calledR calledD leadsR leadsTiedIndependentAwaiting
Senate race by county
| County | Dem | GOP | Ind | |
|---|---|---|---|---|
| Aurora | – | 679 | 289 | |
| Beadle | – | 3,282 | 1,518 | |
| Bennett | – | 499 | 333 | |
| Bon Homme | – | 1,540 | 605 | |
| Brookings | – | 6,408 | 5,033 | |
| Brown | – | 7,277 | 4,734 | |
| Brule | – | 1,211 | 560 | |
| Buffalo | – | 142 | 222 | |
| Butte | – | 2,524 | 906 | |
| Campbell | – | 488 | 113 | |
| Charles Mix | – | 1,837 | 815 | |
| Clark | – | 1,170 | 363 | |
| Clay | – | 1,770 | 2,276 | |
| Codington | – | 6,421 | 3,452 | |
| Corson | – | 395 | 315 | |
| Custer | – | 3,147 | 1,507 | |
| Davison | – | 4,014 | 2,027 | |
| Day | – | 1,389 | 856 | |
| Deuel | – | 1,187 | 500 | |
| Dewey | – | 579 | 675 | |
| Douglas | – | 1,084 | 175 | |
| Edmunds | – | 1,088 | 352 | |
| Fall River | – | 2,217 | 1,050 | |
| Faulk | – | 658 | 157 | |
| Grant | – | 2,043 | 858 | |
| Gregory | – | 1,186 | 385 | |
| Haakon | – | 711 | 125 | |
| Hamlin | – | 1,658 | 573 | |
| Hand | – | 989 | 278 | |
| Hanson | – | 887 | 294 | |
| Harding | – | 567 | 90 | |
| Hughes | – | 4,266 | 2,187 | |
| Hutchinson | – | 1,957 | 598 | |
| Hyde | – | 397 | 109 | |
| Jackson | – | 510 | 258 | |
| Jerauld | – | 488 | 205 | |
| Jones | – | 380 | 75 | |
| Kingsbury | – | 1,421 | 630 | |
| Lake | – | 2,831 | 1,595 | |
| Lawrence | – | 6,460 | 4,396 | |
| Lincoln | – | 15,387 | 10,866 | |
| Lyman | – | 728 | 396 | |
| Marshall | – | 1,007 | 648 | |
| McCook | – | 1,555 | 607 | |
| McPherson | – | 816 | 176 | |
| Meade | – | 6,916 | 3,085 | |
| Mellette | – | 372 | 234 | |
| Miner | – | 622 | 262 | |
| Minnehaha | – | 34,354 | 32,260 | |
| Moody | – | 1,517 | 933 | |
| Oglala Lakota | – | 336 | 1,814 | |
| Pennington | – | 21,843 | 16,373 | |
| Perkins | – | 985 | 280 | |
| Potter | – | 745 | 179 | |
| Roberts | – | 1,730 | 1,227 | |
| Sanborn | – | 585 | 242 | |
| Spink | – | 1,539 | 718 | |
| Stanley | – | 981 | 344 | |
| Sully | – | 575 | 137 | |
| Todd | – | 404 | 1,202 | |
| Tripp | – | 1,540 | 392 | |
| Turner | – | 2,344 | 898 | |
| Union | – | 3,862 | 1,902 | |
| Walworth | – | 1,272 | 368 | |
| Yankton | – | 4,499 | 3,185 | |
| Ziebach | – | 300 | 267 |