- Lead
- 3,815
- Total
- 33,996
- vs nation
- D+12.7
Colorado 31st State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 7,428
- Total
- 36,225
- vs nation
- D+16.0
- Lead
- 3,952
- Total
- 30,346
- vs nation
- D+10.9
- Lead
- 5,980
- Total
- 27,779
- vs nation
- D+17.7
- Lead
- 5,784
- Total
- 25,107
- vs nation
- D+15.8
- Lead
- 1,561
- Total
- 21,247
- vs nation
- D+9.8
- Lead
- 1,834
- Total
- 16,839
- vs nation
- D+10.4
- Lead
- 2,519
- Total
- 14,845
- vs nation
- D+8.4
Key facts
- 2024 presidential margin
- D+11.2MIT Election Lab
- Population
- 86,8652024 5-year
- Population density
- 4,620 / sq mi2024 5-year · TIGER/Line
- Land area
- 18.8 sq miTIGER/Line
- Median household income
- $90,1652024 5-year
- White (non-Hispanic)
- 41.4%2024 5-year
- Black
- 2.2%2024 5-year
- Hispanic / Latino
- 47.2%2024 5-year
- Peak Democratic margin
- D+42.6 in 1964MIT Election Lab
- Peak Republican margin
- R+22.6 in 1924MIT Election Lab
- Most similar
- State House District 32, CO · twin score 98.4
presidential history
Party record book
Colorado 31st State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1904–2024 · 31 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Lyndon B. Johnson1964
71.0%
5,788 votes · D+42.6 · modeled estimate
Runner-up · Woodrow Wilson, 1916 · 62.0%
Republican
Herbert Hoover1928
60.3%
610 votes · R+22.0 · modeled estimate
Runner-up · Richard Nixon, 1972 · 58.1%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
21,225votes
58.6% of the vote · D+20.5 · modeled estimate
Runner-up · Kamala Harris, 2024 · 18,458 votes
Republican
Donald Trump2024
14,643votes
43.1% of the vote · D+11.2 · modeled estimate
Runner-up · Donald Trump, 2020 · 13,797 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
Woodrow Wilson1916
+25.5pts D vs U.S.
Place D+28.6 · U.S. D+3.1 · modeled estimate
Runner-up · Alton B. Parker, 1904 · +20.5 pts
Republican
Thomas E. Dewey1944
+11.4pts R vs U.S.
Place R+3.9 · U.S. D+7.5 · modeled estimate
Runner-up · Wendell Willkie, 1940 · +6.2 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Colorado 31st State House District sits in the Rocky Mountain West. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 42.6 points in 1964 and a Republican high of 22.6 points in 1924. Between 2020 and 2024 the district moved 9.3 points toward the Republican candidate; the 2024 margin was 11.2 points.
A population of 86,865, a 41% non-Hispanic-white share, and a median household income of $90,165 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 32 and State House District 35.
The state-house 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 31st State House District. Akashic. https://akashic.app/sld-lower/08031/. Accessed May 20, 2026. License: CC BY 4.0.