- Lead
- 40,446
- Total
- 91,039
- vs nation
- R+43.0
Colorado 1st State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 37,127
- Total
- 88,164
- vs nation
- R+46.6
- Lead
- 33,589
- Total
- 74,873
- vs nation
- R+47.0
- Lead
- 22,524
- Total
- 66,119
- vs nation
- R+37.9
- Lead
- 19,164
- Total
- 61,932
- vs nation
- R+38.2
- Lead
- 25,134
- Total
- 57,390
- vs nation
- R+41.3
- Lead
- 18,791
- Total
- 47,185
- vs nation
- R+40.3
- Lead
- 9,627
- Total
- 42,702
- vs nation
- R+31.1
Key facts
- 2024 presidential margin
- R+44.4MIT Election Lab
- Population
- 162,8362024 5-year
- Population density
- 13 / sq mi2024 5-year · TIGER/Line
- Land area
- 12,724 sq miTIGER/Line
- Median household income
- $82,4692024 5-year
- White (non-Hispanic)
- 69.1%2024 5-year
- Black
- 1.4%2024 5-year
- Hispanic / Latino
- 24.7%2024 5-year
- Peak Democratic margin
- D+38.5 in 1896MIT Election Lab
- Peak Republican margin
- R+50.4 in 1880MIT Election Lab
- Most similar
- State Senate District 29, OR · twin score 92.0
presidential history
Party record book
Colorado 1st State Senate 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
67.3%
3,412 votes · D+38.5 · modeled estimate
Runner-up · Woodrow Wilson, 1916 · 57.4%
Republican
Ronald Reagan1984
73.9%
31,410 votes · R+48.9 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 72.7%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
24,571votes
27.9% of the vote · R+42.1 · modeled estimate
Runner-up · Kamala Harris, 2024 · 24,261 votes
Republican
Donald Trump2024
64,707votes
71.1% of the vote · R+44.4 · modeled estimate
Runner-up · Donald Trump, 2020 · 61,698 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
+44.6pts D vs U.S.
Place D+38.5 · U.S. R+6.1 · modeled estimate
Runner-up · Woodrow Wilson, 1916 · +16.1 pts
Republican
Benjamin Harrison1892
+51.1pts R vs U.S.
Place R+49.5 · U.S. D+1.7 · a third-party candidate carried the Place · modeled estimate
Runner-up · Donald Trump, 2016 · +47.0 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
The district recorded a Republican presidential margin of R+44.4 in 2024, compared with R+30.9 in 2008. About 378,000 residents lived here, with White alone at 72.8% in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 38.5 points in 1896 and a Republican high of 50.4 points in 1880. Between 2020 and 2024 the district moved 2.3 points toward the Republican candidate; the 2024 margin was 44.4 points.
A population of 162,836, a 69% non-Hispanic-white share, and a median household income of $82,469 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 29 and State Senate District 30.
The state-senate 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 State Senate District. Akashic. https://akashic.app/sld-upper/08001/. Accessed May 20, 2026. License: CC BY 4.0.