| Election Name: | 1986 United States Senate election in Colorado |
| Country: | Colorado |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1980 United States Senate election in Colorado |
| Previous Year: | 1980 |
| Next Election: | 1992 United States Senate election in Colorado |
| Next Year: | 1992 |
| Election Date: | November 4, 1986 |
| Image1: | Tim Wirth (1).jpg |
| Nominee1: | Tim Wirth |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 529,449 |
| Percentage1: | 49.91% |
| Nominee2: | Ken Kramer |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 512,994 |
| Percentage2: | 48.36% |
| U.S. Senator | |
| Before Election: | Gary Hart |
| Before Party: | Democratic Party (United States) |
| After Election: | Tim Wirth |
| After Party: | Democratic Party (United States) |
| Map Size: | 250px |
The 1986 United States Senate election in Colorado was held on November 4, 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.