United States congressional delegations from Colorado

Since Colorado became a U.S. state in 1876,^[1] it has sent congressional delegations to the United States Senate and United States House of Representatives, beginning with the 44th United States Congress. Prior to statehood, the Colorado Territory sent non-voting delegates to the House of Representatives from 1861 to 1876.^[2] Each state elects two senators to serve for six years, and members of the House to two-year terms. Each state elects two senators to serve for six years in general elections, with their re-election staggered. Prior to the ratification of the Seventeenth Amendment in 1913, senators were elected by the Colorado General Assembly.^[3] Each state elects a varying number of, but at least one,^[4] member of the House, depending on population, to two-year terms.^[5] Colorado has sent eight members to the House in each congressional delegation since the 2020 United States Census.^[6]

A total of 80 people have served Colorado in the House and 37 have served Colorado in the Senate. The first of seven women to serve Colorado in Congress was Pat Schroeder, who served in the House from 1973 to 1996.^[7] The first and only African-American to have served Colorado in Congress is Joe Neguse.^[8]

The current dean, or longest-serving member, of the Colorado delegation is Representative Diana DeGette of the 1st district, who has served in the House since 1997.^[9] She is the second-longest serving member of Congress in Colorado history, only behind Edward T. Taylor, who served in the House from 1909 to 1941.^[10][11] Henry M. Teller, who served more than 30 years in the Senate,^[12] is the longest-serving senator in Colorado history.^[13]