1970 United States Senate election in Wisconsin

The 1970 United States Senate election in Wisconsin was held on November 3, 1970. Incumbent Democrat William Proxmire was easily re-elected to a third term in office over Republican John E. Erickson, taking more than 70% of the vote, and defeating Erickson by more than 42 percentage points.

Candidates

 * Elizabeth "Betty" Boardman (Independent)
 * John E. Erickson, general manager of the Milwaukee Bucks and former head coach of the Wisconsin Badgers men's basketball team (Republican)
 * Edmond G. Hou-Seye, businessman (American Independent)
 * William Proxmire, incumbent Senator (Democratic)
 * Martha M. Quinn (Socialist Workers)
 * Adolf Wiggert (Socialist Labor)