United States Senate – DEM Hold
Mike Mansfield (D-inc) – 150,060 – 60.54%
Harold E. (Bud) Wallace (R) – 97,809 – 39.46%
Total Votes – 247,869 – 100.00%
United States House of Representatives – District 1 – GOP Gain
Dick Shoup (R) – 64,388 – 50.48%
Arnold Olsen (D-inc) – 63,175 – 49.52%
Total Votes – 127,563 – 100.00%
United States House of Representatives – District 2 – DEM Hold
John Melcher (D-inc) – 78,082 – 64.09%
Jack Rehberg (R) – 43,752 – 35.91%
Total Votes – 121,834 – 100.00%