Wirth: 40–50% 50–60% 60–70%
The 1986 United States Senate election in Colorado was held on November 3, 1986. Incumbent Democratic U.S. Senator Gary Hart decided to retire instead of seeking a third term. Democratic nominee Tim Wirth won the open seat.
- Tim Wirth, U.S. Representative
- Ken Kramer, U.S. Representative
|Independent||Michael Martin Bush||11,127||1.05%|
|Socialist Workers||Michael R. Chamberlain||3,756||0.35%|
|Independent American||Henry John Olshaw||1,868||0.18%||-0.17%|
|Prohibition||Calvin G. Dodge||1,571||0.15%|