CO HB1265

Counties with a population of 250,000 or more must have five county commissioners, effective January 1, 2032, and must choose one of three election methods: all five elected by district, three by district plus two at-large, or all five at-large using ranked choice voting (single transferable vote method)

Counties with populations between 70,000 and 250,000 retain the current discretionary system allowing either three or five commissioners with various election methods

Voters in affected large counties will decide which of the three election methods to use through a ballot measure at the first general election following the board's adoption of a resolution designating the alternatives

The board of county commissioners or registered electors (via petition with 8% of qualified voters) may later change the election method by placing the question on a general election ballot

Districts must be nearly equal in population with no more than 5% deviation between the most and least populous districts, and commissioners who move out of their district during their term automatically vacate their office