The 1934 United States Senate special election in Montana took place on November 6, 1934. Incumbent United States Senator
John E. Erickson, who, as governor, had appointed himself to the seat in 1933 upon the death of
Thomas J. Walsh, ran for re-election. However, he was defeated in the
Democratic primary by
James E. Murray, who was the former
Silver Bow County Attorney and the Chairman of the State Advisory Board of the
Public Works Administration. In the general election, Murray defeated
Scott Leavitt, a former United States Congressman who had represented
Montana's 2nd congressional district, and an
independent candidate in a landslide to win his first term in the Senate.