The 1960 South Dakota gubernatorial election was held on November 8, 1960.
Incumbent Democratic Governor Ralph Herseth was defeated by Republican nominee Archie M. Gubbrud, who won 50.73% of the vote, Gubbrud defeated Herseth again 2 years later.
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Text from the Wikipedia article “1960 South Dakota gubernatorial election”, available under CC BY-SA 4.0.