Colorado’s congressional lines were drawn for the first time by the voter-approved Independent Congressional Redistricting Commission. After releasing a preliminary eight-district map for public hearings in June 2021, the commission adopted its final plan on September 28, 2021, and filed it with the Colorado Supreme Court on October 1, 2021. The court reviewed the record, found no abuse of the constitutional criteria, and approved the map on November 1, 2021, in In re Independent Congressional Redistricting Commission, 2021 CO 73. Because Article V, §44.5 makes the Court’s decision final, the plan now governs elections through 2030.

A sister body, the Independent Legislative Redistricting Commission, handled the 60-House and 30-Senate districts. It approved the House map on October 11, 2021, and the Senate map a day later, transmitting both to the Supreme Court on October 15. In companion opinions issued November 15, 2021 (In re Legislative Redistricting Commission—House Plan, 2021 CO 74, and —Senate Plan, 2021 CO 75), the justices concluded the commission had met all federal and state standards, so the maps took effect without modification and, like the congressional plan, have faced no subsequent litigation.

last updated: Jan 2026