- Lead
- 7,383
- Total
- 64,212
- vs nation
- R+10.0
Colorado 13th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 2,464
- Total
- 65,278
- vs nation
- R+8.2
- Lead
- 3,682
- Total
- 58,200
- vs nation
- R+8.4
- Lead
- 1,877
- Total
- 51,434
- vs nation
- R+0.2
- Lead
- 3,281
- Total
- 47,082
- vs nation
- R+0.3
- Lead
- 4,290
- Total
- 38,954
- vs nation
- R+8.6
- Lead
- 1,822
- Total
- 29,424
- vs nation
- R+6.7
- Lead
- 820
- Total
- 25,351
- vs nation
- R+5.3
Key facts
- 2024 presidential margin
- R+11.5MIT Election Lab
- Population
- 161,4862024 5-year
- Population density
- 845 / sq mi2024 5-year · TIGER/Line
- Land area
- 191 sq miTIGER/Line
- Median household income
- $73,2942024 5-year
- White (non-Hispanic)
- 45.9%2024 5-year
- Black
- 2.1%2024 5-year
- Hispanic / Latino
- 46.0%2024 5-year
- Peak Democratic margin
- D+77.9 in 1896MIT Election Lab
- Peak Republican margin
- R+31.6 in 1892MIT Election Lab
- Most similar
- State Senate District 21, CO · twin score 88.8
presidential history
Party record book
Colorado 13th 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
87.3%
1,820 votes · D+77.9 · modeled estimate
Runner-up · Woodrow Wilson, 1916 · 67.6%
Republican
Ronald Reagan1984
63.5%
14,064 votes · R+28.1 · modeled estimate
Runner-up · Richard Nixon, 1972 · 61.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
30,363votes
46.5% of the vote · R+3.8 · modeled estimate
Runner-up · Kamala Harris, 2024 · 27,527 votes
Republican
Donald Trump2024
34,910votes
54.4% of the vote · R+11.5 · modeled estimate
Runner-up · Donald Trump, 2020 · 32,827 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
+84.0pts D vs U.S.
Place D+77.9 · U.S. R+6.1 · modeled estimate
Runner-up · William J. Bryan, 1900 · +39.5 pts
Republican
Benjamin Harrison1892
+33.3pts R vs U.S.
Place R+31.6 · U.S. D+1.7 · a third-party candidate carried the Place · modeled estimate
Runner-up · Thomas E. Dewey, 1944 · +16.3 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Colorado 13th State Senate District sits in the Rocky Mountain West. In 2024 it voted Republican.
Across the recorded series it reached a Democratic high of 77.9 points in 1896 and a Republican high of 31.6 points in 1892. Between 2020 and 2024 the district moved 7.7 points toward the Republican candidate; the 2024 margin was 11.5 points.
A population of 161,486, a 46% non-Hispanic-white share, and a median household income of $73,294 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 21 and State Senate District 3.
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 13th State Senate District. Akashic. https://akashic.app/sld-upper/08013/. Accessed May 20, 2026. License: CC BY 4.0.