1966 Illinois U.S. Senate Election

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

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

Everett M. Dirksen won the 1966 Illinois U.S. Senate Election. Everett M. Dirksen received 2,358,947 popular votes (53.01%). The main challenger was William G. Clark (46.59%).

See the full head-to-head between Dirksen and Clark

Dirksen +6.4 pts · won by 285,705 votes

Everett M. Dirksen RepublicanWINNER53.01%

2,358,947 votes

William G. Clark Democratic46.59%

2,073,242 votes

Louis FisherSocialist Labor0.39%

17,542 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.