Colorado's 1st Congressional District
Colorado · CO-01
Colorado's 1st Congressional District is one of 8 U.S. House districts in Colorado, represented in Congress by Diana DeGette (Democrat). It is home to roughly 720,932 people, with a median age of 35.2. The population is about 55% White. The median household income is $92,382, and 56% of adults 25 and older hold a bachelor’s degree or higher. In the 2024 presidential election it voted safely Democratic (D+56).
Representative
Current U.S. House member (source: house.gov).
Geography
CO-01 is shown in red. Click a neighboring district to open it, or zoom out to explore the country.
Covering 155 square miles, CO-01 is the 393rd-largest of the 435 congressional districts by land area. With about 4,651 residents per square mile, it is a heavily urban district. Its shape is very irregular: the district's Polsby-Popper score of 0.11 ranks 404th of 435 nationally, where 1st is the most compact.
Presidential results
In the 2024 presidential election, 77% of CO-01 voters backed Kamala Harris and 21% Donald Trump — a D+56 margin. That is a 5.0-point shift toward the Republicans from 2020, when the district voted D+61.
Two-party presidential vote by district (source: The Downballot).
Who lives here
The median resident of the district is 35.2 years old; 18.3% of residents are under 18 and 12.2% are 65 or older. About 13.8% of residents were born outside the United States, and 23.5% speak a language other than English at home.
U.S. Census Bureau, American Community Survey (5-year estimates).
Economy & education
At $92,382, the district's median household income ranks 111th of 435 districts nationwide. The typical owner-occupied home is worth $586,712, and the median rent is $1,769 a month. 11.2% of residents live below the poverty line, and workers average a 27.3-minute commute (24.3% work from home).
U.S. Census Bureau, American Community Survey (5-year estimates).