PolitiFinder

1964 Montana U.S. Senate Election

Montana · 2 candidates · See every 1964 U.S. Senate race

Who won the 1964 Montana U.S. Senate Election?

Mike Mansfield won the 1964 Montana U.S. Senate Election. Mike Mansfield received 180,643 popular votes (64.51%). The main challenger was Alex Blewett (35.49%).

See the full head-to-head between Mansfield and Blewett

Mansfield +29.0 pts · won by 81,276 votes
Mike MansfieldDemocraticWINNER64.51%
180,643 votes
Alex BlewettRepublican35.49%
99,367 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.