- Lead
- 205,104
- Total
- 365,575
- vs nation
- D+57.6
Colorado 1st Congressional District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 243,452
- Total
- 396,963
- vs nation
- D+56.9
- Lead
- 183,126
- Total
- 334,678
- vs nation
- D+52.6
- Lead
- 150,121
- Total
- 305,020
- vs nation
- D+45.4
- Lead
- 143,520
- Total
- 274,044
- vs nation
- D+45.1
- Lead
- 96,919
- Total
- 240,822
- vs nation
- D+42.7
- Lead
- 61,965
- Total
- 199,943
- vs nation
- D+30.5
- Lead
- 62,153
- Total
- 196,092
- vs nation
- D+23.2
Key facts
- 2024 presidential margin
- D+56.1MIT Election Lab
- Population
- 721,0152024 5-year
- Population density
- 4,685 / sq mi2024 5-year · TIGER/Line
- Land area
- 154 sq miTIGER/Line
- Median household income
- $94,5922024 5-year
- White (non-Hispanic)
- 54.5%2024 5-year
- Black
- 8.6%2024 5-year
- Hispanic / Latino
- 27.8%2024 5-year
- Peak Democratic margin
- D+85.8 in 1896MIT Election Lab
- Peak Republican margin
- R+49.2 in 1924MIT Election Lab
- Most similar
- Congressional District 37, TX · twin score 94.5
presidential history
Party record book
Colorado 1st Congressional District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1880) · 37 presidential cycles · 37 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
William J. Bryan1896
92.1%
676 votes · D+85.8 · modeled estimate
Runner-up · Joe Biden, 2020 · 79.5%
Republican
Calvin Coolidge1924
67.1%
58,843 votes · R+49.2 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 63.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
315,697votes
79.5% of the vote · D+61.3 · modeled estimate
Runner-up · Kamala Harris, 2024 · 280,458 votes
Republican
Richard Nixon1972
121,908votes
54.1% of the vote · R+10.6 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 121,066 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
William J. Bryan1896
+91.9pts D vs U.S.
Place D+85.8 · U.S. R+6.1 · modeled estimate
Runner-up · Kamala Harris, 2024 · +57.6 pts
Republican
Benjamin Harrison1892
+36.8pts R vs U.S.
Place R+35.1 · U.S. D+1.7 · a third-party candidate carried the Place · modeled estimate
Runner-up · Calvin Coolidge, 1924 · +24.0 pts
Current officeholders
Federal officeholders only. State and local officeholders are planned for the next data pass.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each result reflects the U.S. House district as it was drawn for that election; redistricting has redrawn these lines over time, so they can differ from the current 120th-Congress district shown on the map above.
Colorado's 1st district covers most of Denver and posts presidential margins rarely seen outside major metro cores — Biden and Harris each carried it by roughly 50 points, reflecting a dense, highly educated, and majority-minority electorate.
Across the recorded series it reached a Democratic high of 85.8 points in 1896 and a Republican high of 49.2 points in 1924. Between 2020 and 2024 the district moved 5.2 points toward the Republican candidate; the 2024 margin was 56.1 points.
A population of 721,015, a 55% non-Hispanic-white share, and a median household income of $94,592 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 37 and Congressional District 3.
The congressional districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
Colorado 1st Congressional District. Akashic. https://akashic.app/cd/0801/. Accessed May 20, 2026. License: CC BY 4.0.