The 1930 United States Senate election in Montana took place on November 4, 1930. Incumbent United States Senator
Thomas J. Walsh, who was first elected to the Senate in 1912, and re-elected in 1918 and
1924, ran for re-election. He won the
Democratic primary unopposed, and faced
Montana Supreme Court Associate Justice Albert J. Galen, the
Republican nominee, and several
independent opponents in the general election. Ultimately, Walsh defeated his opponents in a landslide and won his fourth and final term in the Senate.