Colorado voters to decide on constitutional amendment that would require approval from an independent commission and the state supreme court for mid-decade redistricting maps

Voters in Colorado will decide on a ballot measure related to mid-decade redistricting on Nov. 3, 2026.

The initiated constitutional amendment — known as Initiative 256 — would require any mid-decade redistricting plan to be approved by both the state's independent redistricting commission and the Colorado Supreme Court.

The Colorado secretary of state's office certified Initiative 256 for the ballot on Aug. 31, 2026, announcing that its proponents submitted 141,866 valid signatures, surpassing the required minimum of 124,238.