Elections / 1990 · Senate · SD
The Republican candidate won South Dakota's Senate seat R+7.3.
South Dakota, 1990. Party-level statewide totals below — candidate names join when the raw MEDSL store is re-fetched with name columns.
South Dakota — 1990 Senate result
Source: MIT Election Data + Science Lab, 1976–2024 Senate returns (party-classified by literal ballot party).
Democratic (D)
116,727
45.1%
Republican (R)
135,682
52.4%
All others
6,567
2.5%
Margin
R+7.3
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% |