The 1974 South Dakota gubernatorial election was held on November 5, 1974, to elect a Governor of South Dakota. This election was the first in South Dakota to elect the governor for a four-year term, after it was allowed by a constitutional amendment passed in 1972. Democratic nominee and Governor Richard F. Kneip was re-elected, defeating Republican nominee John E. Olson. As of 2024[ [update]], this is the last time that a Democrat was elected Governor of South Dakota, marking the start of the longest Republican winning streak in the country for a state's governorship, as well as the longest gubernatorial winning streak by a single party.
Democratic primary.
Results.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
! scope="col" style="width: 5em" |Votes
! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
Republican primary.
Results.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
! scope="col" style="width: 5em" |Votes
! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
General election.
Results.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
! scope="col" style="width: 5em" |Votes
! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
References.
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