1966 United States Senate election in Maine

The 1966 United States Senate election in Maine was held on November 8, 1966. Incumbent Republican U.S. Senator Margaret Chase Smith was re-elected to a fourth term over Democratic State Senator Elmer H. Violette.

Candidates

 * Margaret Chase Smith, U.S. Senator since 1949

Results
Senator Smith was unopposed for renomination

Candidates

 * Jack L. Smith
 * Plato Truman, perennial candidate
 * Elmer H. Violette, State Senator from Van Buren