List of United States senators from Colorado
was admitted to the Union on August 1, 1876 and elects U.S. senators to Senate Class 2 and Class 3. Its current U.S. senators are Democrat Michael Bennet and Republican Cory Gardner, making it one of nine states to have a split United States Senate delegation.
List of senators
! rowspan=4 | 1! rowspan=2 | 1
! rowspan=5 | 2
! 2
! 3
! rowspan=3 | 4
! rowspan=12 | 3
! rowspan=6 | 5
! rowspan=3 | 6
! rowspan=5 | 7
! 4
! rowspan=5 | 5
! rowspan=3 | 8
! rowspan=9 | 9
! rowspan=2 | 6
! 7
! rowspan=2 | 8
! rowspan=3 | 9
! rowspan=6 | 10
! 10
! 11
! rowspan=5 | 12
! rowspan=11 | 11
! rowspan=8 | 13
! rowspan=9 | 12
! rowspan=3 | 14
! rowspan=6 | 15
! rowspan=3 | 13
! rowspan=6 | 16
! rowspan=6 | 14
! rowspan=3 | 17
! rowspan=4 | 15
! rowspan=7 | 18
! rowspan=6 | 16
! rowspan=3 | 19
! rowspan=4 | 17
! rowspan=7 | 20
! rowspan=3 | 18
Living former senators
, there are seven living former senators. The most recent senator to die was Bill Armstrong on July 5, 2016, and was also the most recently serving senator to die.| Senator | Term of office | Date of birth |
| Gary Hart | January 3, 1975 – January 3, 1987 | |
| Tim Wirth | January 3, 1987 – January 3, 1993 | |
| Hank Brown | January 3, 1991 – January 3, 1997 | |
| Ben N. Campbell | January 3, 1993 – January 3, 2005 | |
| Wayne Allard | January 3, 1997 – January 3, 2009 | |
| Ken Salazar | January 3, 2005 – January 20, 2009 | |
| Mark Udall | January 3, 2009 – January 3, 2015 |