Colorado's 1st Congressional District (CO-1)
Last updated · 5 sources
Diana DeGette, a Democrat, has represented the district since 1997.
The district includes parts of Denver, Arapahoe, and Jefferson counties.
According to the Census Bureau's 2020–2024 American Community Survey 5-year estimates, the district has a population of 724,976, a median household income of $94,592, and a median age of 35.2. Of residents 25 and older, 56.5% hold a bachelor's degree or higher.
Representative
2026 election
DeGette lost the 2026 primary for this seat on Jun 30, 2026.
5 candidates have reported raising money for the 2026 CO-1 race to the FEC.
Election Day: Tuesday, November 3, 2026
| Candidate | Party | Raised | Cash on hand | Through |
|---|---|---|---|---|
| Diana DeGette (incumbent) | Democratic | $1,671,531 | $290,389 | Jun 30 |
| Melat Kiros | Democratic | $1,091,198 | $126,406 | Jun 30 |
| Wanda James | Democratic | $299,970 | $33,929 | Jun 30 |
| Santiago Emmanuel Palomino | Democratic | $6,637 | -$4,067 | Jun 30 |
| Christy Peterson | Republican | $2,057 | $1,703 | Jun 30 |
Includes primary candidates; FEC filings do not record primary results. FEC race page
District profile
- Population
- 724,976
- Median household income
- $94,592
- Median age
- 35.2
- Bachelor's degree or higher
- 56.5%
Census Bureau, 2020–2024 American Community Survey 5-year estimates
Colorado senators
Michael BennetU.S. Senator for Colorado · Democrat
John HickenlooperU.S. Senator for Colorado · Democrat
Neighboring districts
Sources
- District boundaries (Census Bureau cartographic boundary file, 119th Congress) · retrieved Oct 2, 2026
- Counties by district (Census Bureau relationship file) · retrieved Oct 2, 2026
- District profile (Census Bureau, 2020–2024 American Community Survey 5-year estimates) · retrieved Oct 2, 2026
- congress-legislators (member data, CC0) · retrieved Oct 2, 2026
- Candidates and totals (Federal Election Commission) · retrieved Oct 2, 2026