| Election Name: | 1990 South Dakota gubernatorial election |
| Country: | South Dakota |
| Flag Year: | 1963 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1986 South Dakota gubernatorial election |
| Previous Year: | 1986 |
| Next Election: | 1994 South Dakota gubernatorial election |
| Next Year: | 1994 |
| Turnout: | 61.07% (voting eligible)[1] |
| Image1: | File:George S. Mickelson (cropped).jpeg |
| Nominee1: | George Mickelson |
| Party1: | Republican Party (United States) |
| Running Mate1: | Walter Dale Miller |
| Popular Vote1: | 151,198 |
| Percentage1: | 58.9% |
| Nominee2: | Bob Samuelson |
| Party2: | Democratic Party (United States) |
| Running Mate2: | Shirley Halleen |
| Popular Vote2: | 105,525 |
| Percentage2: | 41.1% |
| Map Size: | 260px |
| Governor | |
| Before Election: | George Mickelson |
| Before Party: | Republican Party (United States) |
| After Election: | George Mickelson |
| After Party: | Republican Party (United States) |
The 1990 South Dakota gubernatorial election took place on November 6, 1990, to elect a Governor of South Dakota. Republican Governor George S. Mickelson was re-elected, defeating Democratic nominee Bob L. Samuelson. As of, this was the last time Oglala County and Todd County voted for a Republican gubernatorial candidate. Mickelson died in a plane crash near Zwingle, Iowa on April 19, 1993.[2]