1966 Michigan U.S. Senate Election

Michigan · 3 candidates · See every 1966 U.S. Senate race

Who won the 1966 Michigan U.S. Senate Election?

Robert P. Griffin won the 1966 Michigan U.S. Senate Election. Robert P. Griffin received 1,363,530 popular votes (55.9%). The main challenger was G. Mennen Williams (43.85%).

See the full head-to-head between Griffin and Williams

Griffin +12.0 pts · won by 294,046 votes

Robert P. Griffin RepublicanWINNER55.9%

1,363,530 votes

G. Mennen Williams Democratic43.85%

1,069,484 votes

Ralph W. MuncySocialist Labor0.25%

6,166 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.