1940 United States Senate election in Maine

The 1940 United States Senate election in Maine was held on September 9, 1940.

Incumbent Republican Senator Frederick Hale did not run for re-election. Republican U.S. Representative and former Governor Owen Brewster won the open seat, defeating two Governors of Maine: incumbent Republican Governor Lewis Barrows in the primary and former Democratic Governor Louis Brann in the general election.

Candidates

 * Lewis O. Barrows, Governor of Maine
 * Owen Brewster, U.S. Representative from Dexter and former Governor (1925–29)

Candidates

 * Louis J. Brann, former Governor of Maine (1933–37)

Results
Brann was unopposed for the Democratic nomination.