Here is a look at who will be on the ballot in the state's congressional primaries, district by district. Listed are major-party contenders.
In Colorado's highly competitive 8th Congressional District, the Libertarian candidate plans to drop out of the race and has endorsed one of the major-party candidates.
The district includes a large agricultural base and energy sector — two key industries for Colorado.
In the 8th Congressional District, Republican Congresswoman Lauren Boebert and her Democratic challenger Trisha Calvarese clashed over business and economic issues.
Republican Jeff Hurd and Democrat Adam Frisch will face off in Congressional District 3 in November.
Economic issues took center stage during a recent debate between the two candidates vying for Colorado's Fourth District congressional seat.
Six Republicans are competing for the seat currently held by Congresswoman Lauren Boebert.
Despite not facing Lauren Boebert in the general election, Democrat Adam Frisch continues to raise significant funds for his congressional campaign.
Lauren Boebert emerged victorious in the Republican primary, as announced by The Associated Press. Vote totals have been certified.
