The 1972 United States Senate election in Colorado took place on November 7, 1972. Incumbent Republican U.S. Senator Gordon Allott ran for re-election to a fourth term, but was narrowly defeated by Democratic former State Representative Floyd Haskell. This would be the last time until 2008 that a Democrat was elected to the Class 2 Senate seat from Colorado.
Floyd Haskell, former Republican State Representative from Littleton
Anthony Vollack, State Senator from Arvada
Results[]
Floyd Haskell, a former State Representative who had served as a Republican from 1965–67, but had left the party in 1970 over opposition to the Vietnam War, won the primary.