1958 Wisconsin U.S. Senate Election

Wisconsin · 4 candidates · See every 1958 U.S. Senate race

Who won the 1958 Wisconsin U.S. Senate Election?

William Proxmire won the 1958 Wisconsin U.S. Senate Election. William Proxmire received 682,440 popular votes (57.13%). The main challenger was Roland J. Steinle (42.73%).

See the full head-to-head between Proxmire and Steinle

Proxmire +14.4 pts · won by 172,042 votes

William Proxmire DemocraticWINNER57.13%

682,440 votes

Roland J. Steinle Republican42.73%

510,398 votes

James E. BoultonSocialist Workers0.1%

1,226 votes

Georgia CozziniSocialist Labor0.04%

537 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.