The 1st district is located in Central Colorado and includes most of the city of Denver. The incumbent is Democrat Diana DeGette, who has represented the district since 1997. She was re-elected with 66% of the vote in 2014 and the district has a PVI of D+18.
Democratic primary
Candidates
;Declared
Diana DeGette - Incumbent
Charles H. "Chuck" Norris
Results
Republican primary
Candidates
;Declared
Charles "Casper" Stockham
Results
General election
Results
District 2
The 2nd district is located in Northern Colorado and encompasses seven counties. The incumbent is Democrat Jared Polis, who has represented the district since 2009. He was re-elected with 56% of the vote in 2014 and isn't expected to have a primary challenger.
Democratic primary
Candidates
;Declared
Jared Polis - Incumbent
Results
Republican primary
Candidates
;Declared
Nicholas Morse, marketing executive
Results
Libertarian primary
Candidates
Richard Longstreth
General election
Results
District 3
The 3rd district is located in Western and Southern Colorado and includes a large number of sparsely populated counties and the city ofGrand Junction. The incumbent is Republican Scott Tipton, who has represented the district since 2011. He was re-elected with 58% of the vote in 2014 and the district has a PVI of R+5. Tipton was mentioned as a potential candidate for the U.S. Senate, but announced that he will run for re-election instead.
Democratic primary
Candidates
;Declared
Gail Schwartz
Results
Republican primary
Candidates
;Declared
Scott Tipton - Incumbent
Alexander Beinstein
Results
General election
Results
District 4
The 4th district is located in Eastern Colorado and includes numerous sparsely populated counties. The incumbent is Republican Ken Buck, who has represented the district since 2015. He was elected with 65% of the vote in 2014 and the district has a PVI of R+11.
Democratic primary
Candidates
;Declared
Bob Seay
Results
Republican primary
Candidates
;Declared
Ken Buck - Incumbent
Results
General election
Results
District 5
The 5th district is located in Central Colorado and includes Fremont, El Paso, Teller and Chaffee counties and the city of Colorado Springs. The incumbent is Republican Doug Lamborn, who has represented the district since 2007. He was re-elected with 60% of the vote in 2014 and the district has a PVI of R+13.
The 6th district is located in Central Colorado and surrounds the city of Denver from the east, including the city of Aurora. The incumbent is Republican Mike Coffman, who has represented the district since 2009. He was re-elected with 52% of the vote in 2012 and the district has a PVI of D+1. The conservativepolitical advocacy groupAmericans for Prosperity, which receives funding from the Koch brothers, launched a six-figure campaign effort supporting Coffman's candidacy. On July 5, 2015, Morgan Carroll, the former president of the Colorado Senate, announced she planned to challenge Coffman. Andrew Romanoff, the former Speaker of the Colorado House of Representatives and the 2014 Democratic nominee, considered running again but ultimately decided against it. Former state representative Edward Casso established an exploratory committee in 2014 in preparation for a potential challenge, but ultimately did not run.
Democratic primary
Candidates
;Declared
Morgan Carroll, former Minority Leader of the Colorado Senate
The 7th district is located in Central Colorado, to the north and west of Denver and includes the cities of Thornton and Westminster and most of Lakewood. The incumbent is Democrat Ed Perlmutter, who has represented the district since 2007. He was re-elected with 55% of the vote in 2014 and the district has a PVI of D+5.
