Colorado's 1st Congressional District

Colorado's 1st Congressional District is represented by Diana DeGette (Democrat), who has held the seat since 1997. DeGette has an overall VoteSee report card grade of D, voted in 98% of roll-call votes on bills this Congress, and votes with the Democratic majority 96% of the time. The district includes Denver, Glendale, and Holly Hills. It takes in all or part of 3 counties, and 99% of residents live in Denver County. About 725,000 people live in the district, and the median household income is $94,592.

Current Representative

Diana DeGette (Democrat) has represented Colorado's 1st Congressional District since 1997.

VoteSee report card grade: D
Attendance in the 119th Congress: 98% of roll-call votes on bills
Votes with the Democrat majority: 96%

See Diana DeGette's full voting record and issue positions →

2026 Election

U.S. House: Colorado 1st District

Winner: Melat Kiros.

This is an open seat: Diana DeGette lost the primary. 5 candidates were on the Nov 3, 2026 ballot.

Melat Kiros (Democratic): raised $1.3M, $76K cash on hand
Christy Peterson (Republican): raised $9K, $7K cash on hand
*Shimon Blau (Independent): raised $204K, $60K cash on hand
Chad Humphrey (Libertarian)
Critter Milton (Unity)

Polls: No public polls

See the full 2026 race →

District Demographics

Population: 724,976
Median household income: $94,592
Median age: 35
Median home value: $616,600
Bachelor's degree or higher: 56.5%

Source: American Community Survey 2020–2024 5-year estimates, 119th Congress boundaries.

How DeGette Voted Recently

Yea on American Enrichment Deployment Act (Nov 9, 2026) — Passed
Yea on Nuclear REFUEL (Recycling Efficient Fuels Utilizing Expedited Licensing) Act (Nov 9, 2026) — Passed
Yea on Retire through Ownership Act (Sep 16, 2026) — Passed
Yea on Water Resources Development Act of 2026 (Sep 16, 2026) — Passed
Yea on Ratepayer Protection Act (Sep 16, 2026) — Passed

Breaks with the Democrat majority

Yea on Lindsey O. Graham Sanctioning Russia and Iran Act of 2026 (Sep 16, 2026) — Passed
Nay on National Fraud Enforcement Division Act of 2026 (Sep 16, 2026) — Passed
Nay on Sunshine Protection Act of 2025 (Jul 14, 2026) — Passed

Who Held This Seat Before

Members of Congress who previously represented Colorado's 1st Congressional District. District lines are redrawn after each census, so earlier members may have represented a different area under this number.

Patricia Schroeder — Democrat (1973–1997)
Mike McKevitt — Republican (1971–1973)
Byron Rogers — Democrat (1951–1971)
John Carroll — Democrat (1947–1951)
Dean Gillespie — Republican (1943–1947)
Lawrence Lewis — Democrat (1933–1945)
William Eaton — Republican (1929–1933)
Sebastian White — Democrat (1927–1929)
William Vaile — Republican (1919–1927)
Benjamin Hilliard — Democrat (1915–1919)
George Kindel — Democrat (1913–1915)
Atterson Rucker — Democrat (1909–1913)

Where the District Is

Colorado's 1st Congressional District covers 154 square miles of land. Boundaries are for the current (119th) Congress.

Counties

Denver County (part): 99% of residents
Arapahoe County (part): 1% of residents
Jefferson County (part): under 1% of residents

Largest communities

Denver (part)
Glendale
Holly Hills

Neighboring Districts

Colorado's 4th Congressional District — Lauren Boebert (Republican)
Colorado's 6th Congressional District — Jason Crow (Democrat)
Colorado's 7th Congressional District — Brittany Pettersen (Democrat)
Colorado's 8th Congressional District — Gabe Evans (Republican)

Colorado's U.S. Senators

Michael Bennet — Democrat, senior senator
John Hickenlooper — Democrat, junior senator