1958 United States Senate election in Wisconsin

The 1958 United States Senate election in Wisconsin was held on November 4, 1958. Incumbent Democrat William Proxmire, who had won a special election to finish the term of the late Senator Joe McCarthy, was re-elected to a full term in office over Wisconsin Supreme Court Justice Roland J. Steinle, a Republican.

Candidates

 * James E. Boulton (Socialist Workers)
 * Georgia Cozzini, perennial candidate (Socialist Labor)
 * William Proxmire, incumbent Senator (Democratic)
 * Roland J. Steinle, Justice of the Wisconsin Supreme Court (Republican)