PolitiFinder

1966 South Dakota U.S. Senate Election

South Dakota · 2 candidates · See every 1966 U.S. Senate race

Who won the 1966 South Dakota U.S. Senate Election?

Karl E. Mundt won the 1966 South Dakota U.S. Senate Election. Karl E. Mundt received 150,517 popular votes (66.28%). The main challenger was Donn H. Wright (33.72%).

See the full head-to-head between Mundt and Wright

Mundt +32.6 pts · won by 73,954 votes
Karl E. MundtRepublicanWINNER66.28%
150,517 votes
Donn H. WrightDemocratic33.72%
76,563 votes
Popular-vote totals for this U.S. Senate election come from the Constituency-Level Elections Archive (CLEA) and the official public record.

Data last verified July 28, 2026.