Colorado's 4th Congressional District

Colorado's 4th Congressional District elects one member to the U.S. House of Representatives. Below is the district's current representative, the members of Congress who held this seat before, and Colorado's two U.S. Senators.

Current Representative

Lauren Boebert (Republican) currently represents Colorado's 4th Congressional District. See Lauren Boebert's full voting record and key issue positions →

District History — Past Representatives

Members of Congress who previously represented Colorado's 4th Congressional District:

• Greg Lopez — Republican (until 2025)
• Ken Buck — Republican (until 2024)
• Betsy Markey — Democrat (until 2011)
• Marilyn Musgrave — Republican (until 2009)
• Bob Schaffer — Republican (until 2003)
• James Johnson — Republican (until 1981)
• Wayne Aspinall — Democrat (until 1973)
• Robert Rockwell — Republican (until 1949)
• Edward Taylor — Democrat (until 1943)

Colorado U.S. Senators

• Michael Bennet — Democrat Senator
• John Hickenlooper — Democrat Senator
• Cory Gardner — Republican Senator
• Mark Udall — Democrat Senator
• Ken Salazar — Democrat Senator
• Wayne Allard — Republican Senator
• Ben Campbell — Republican Senator
• George Brown — Republican Senator
• Timothy Wirth — Democrat Senator
• William Armstrong — Republican Senator
• Gary Hart — Democrat Senator
• Floyd Haskell — Democrat Senator
• Peter Dominick — Republican Senator
• Gordon Allott — Republican Senator
• John Carroll — Democrat Senator
• Eugene Millikin — Republican Senator
• Edwin Johnson — Democrat Senator
• Alva Adams — Democrat Senator
• Edward Costigan — Democrat Senator
• Karl Schuyler — Republican Senator
• Walter Walker — Democrat Senator
• Charles Waterman — Republican Senator
• Lawrence Phipps — Republican Senator
• Rice Means — Republican Senator
• Samuel Nicholson — Republican Senator
• Charles Thomas — Democrat Senator
• John Shafroth — Democrat Senator
• Simon Guggenheim — Republican Senator
• Charles Hughes — Democrat Senator
• Henry Teller — Democrat Senator
• Thomas Patterson — Democrat Senator
• Edward Wolcott — Republican Senator
• Thomas Bowen — Republican Senator
• Nathaniel Hill — Republican Senator
• Horace Tabor — Republican Senator
• George Chilcott — Republican Senator
• Jerome Chaffee — Republican Senator

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