Elections / 2020 · Senate · SD
South Dakota — 2020 U.S. Senate election
Recent presidential results
Akashicstate2020 Senate electionSouth Dakota · U.S. SenateRoundsR+31.5
How it voted
Share of the 2020 vote
| Mike Rounds (i) ✓Republican | 65.7% | 276,232 |
|---|---|---|
| Dan AhlersDemocrat | 34.3% | 143,987 |
2020Senate margin
D+60R+60
66 counties, each filled by 2020 D-vs-R margin. Hover any county for its result.
County-level results (66 counties) — table
| County | Winner | Margin |
|---|---|---|
| AURORA, SD | Republican | R+42.6 |
| BEADLE, SD | Republican | R+44.0 |
| BENNETT, SD | Republican | R+25.0 |
| BON HOMME, SD | Republican | R+44.2 |
| BROOKINGS, SD | Republican | R+21.0 |
| BROWN, SD | Republican | R+28.0 |
| BRULE, SD | Republican | R+39.3 |
| BUFFALO, SD | Democratic | D+18.2 |
| BUTTE, SD | Republican | R+59.7 |
| CAMPBELL, SD | Republican | R+71.9 |
| CHARLES MIX, SD | Republican | R+33.8 |
| CLARK, SD | Republican | R+51.3 |
| CLAY, SD | Republican | R+0.9 |
| CODINGTON, SD | Republican | R+44.7 |
| CORSON, SD | Republican | R+7.8 |
| CUSTER, SD | Republican | R+45.6 |
| DAVISON, SD | Republican | R+39.8 |
| DAY, SD | Republican | R+27.9 |
| DEUEL, SD | Republican | R+46.4 |
| DEWEY, SD | Democratic | D+9.1 |
| DOUGLAS, SD | Republican | R+72.4 |
| EDMUNDS, SD | Republican | R+54.9 |
| FALL RIVER, SD | Republican | R+50.4 |
| FAULK, SD | Republican | R+64.1 |
| GRANT, SD | Republican | R+45.3 |
| GREGORY, SD | Republican | R+56.7 |
| HAAKON, SD | Republican | R+81.4 |
| HAMLIN, SD | Republican | R+57.2 |
| HAND, SD | Republican | R+59.3 |
| HANSON, SD | Republican | R+52.2 |
| HARDING, SD | Republican | R+81.8 |
| HUGHES, SD | Republican | R+41.9 |
| HUTCHINSON, SD | Republican | R+58.9 |
| HYDE, SD | Republican | R+59.8 |
| JACKSON, SD | Republican | R+35.8 |
| JERAULD, SD | Republican | R+44.4 |
| JONES, SD | Republican | R+66.8 |
| KINGSBURY, SD | Republican | R+41.8 |
| LAKE, SD | Republican | R+29.7 |
| LAWRENCE, SD | Republican | R+36.6 |
| LINCOLN, SD | Republican | R+31.7 |
| LYMAN, SD | Republican | R+33.3 |
| MARSHALL, SD | Republican | R+22.0 |
| MCCOOK, SD | Republican | R+42.6 |
| MCPHERSON, SD | Republican | R+64.4 |
| MEADE, SD | Republican | R+53.1 |
| MELLETTE, SD | Republican | R+21.4 |
| MINER, SD | Republican | R+40.8 |
| MINNEHAHA, SD | Republican | R+15.3 |
| MOODY, SD | Republican | R+16.6 |
| OGLALA LAKOTA, SD | Democratic | D+68.1 |
| PENNINGTON, SD | Republican | R+32.5 |
| PERKINS, SD | Republican | R+69.7 |
| POTTER, SD | Republican | R+67.6 |
| ROBERTS, SD | Republican | R+17.7 |
| SANBORN, SD | Republican | R+52.3 |
| SPINK, SD | Republican | R+37.7 |
| STANLEY, SD | Republican | R+54.2 |
| SULLY, SD | Republican | R+63.8 |
| TODD, SD | Democratic | D+43.6 |
| TRIPP, SD | Republican | R+62.7 |
| TURNER, SD | Republican | R+50.4 |
| UNION, SD | Republican | R+45.1 |
| WALWORTH, SD | Republican | R+59.1 |
| YANKTON, SD | Republican | R+29.0 |
| ZIEBACH, SD | Democratic | D+0.9 |
presidential baselinePresident 2020R+26.2Senate 2020R+31.5vs. baselineR+5.3
South Dakota's 2020 Senate race ran 5.3 points more Republican than the presidential race on the same ballot.
South Dakota's Senate margins
Every contest in our store, 1978–2022
| Year | Margin (D minus R) |
|---|---|
| 1978 | −33.7% |
| 1980 | −18.8% |
| 1984 | −49.0% |
| 1986 | +3.2% |
| 1990 | −7.3% |
| 1992 | +32.4% |
| 1996 | +2.6% |
| 1998 | +25.7% |
| 2002 | +0.2% |
| 2004 | −1.2% |
| 2008 | +25.0% |
| 2010 | −100.0% |
| 2014 | −20.9% |
| 2016 | −43.7% |
| 2020 | −31.5% |
| 2022 | −43.5% |
Same ballot, 2020SD
Source. MIT Election Data + Science Lab — 2020 US Senate returns, party-classified by literal ballot party · county returns aggregated from precinct-level results. Real returns — nothing estimated.