PolitiFinder

1966 California U.S. House District 18 Election

California · 2 candidates · See every 1966 U.S. House race

Who won the 1966 California U.S. House District 18 Election?

Robert Mathias won the 1966 California U.S. House District 18 Election. Robert Mathias received 96,699 popular votes (55.88%). The main challenger was Harlan Hagen (44.12%).

See the full head-to-head between Mathias and Hagen

Mathias +11.8 pts · won by 20,353 votes
Robert MathiasRepublicanWINNER55.88%
96,699 votes
Harlan HagenDemocratic44.12%
76,346 votes
Popular-vote totals for this U.S. House election come from the Constituency-Level Elections Archive (CLEA) and the official public record.

Data last verified July 28, 2026.