- Lead
- 1,849
- Total
- 13,091
- vs nation
- D+15.6
Utah 31st State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 1,973
- Total
- 12,460
- vs nation
- D+11.4
- Lead
- 1,690
- Total
- 11,921
- vs nation
- D+12.1
- Lead
- 1,427
- Total
- 10,553
- vs nation
- R+17.4
- Lead
- 730
- Total
- 10,264
- vs nation
- R+0.2
- Lead
- 1,527
- Total
- 9,942
- vs nation
- R+12.9
- Lead
- 1,255
- Total
- 8,471
- vs nation
- R+15.3
- Lead
- 218
- Total
- 7,823
- vs nation
- R+5.7
Key facts
- 2024 presidential margin
- D+14.1MIT Election Lab
- Population
- 45,0142024 5-year
- Population density
- 6,002 / sq mi2024 5-year · TIGER/Line
- Land area
- 7.5 sq miTIGER/Line
- Median household income
- $66,9632024 5-year
- White (non-Hispanic)
- 48.7%2024 5-year
- Black
- 3.8%2024 5-year
- Hispanic / Latino
- 32.9%2024 5-year
- Peak Democratic margin
- D+82.0 in 1896MIT Election Lab
- Peak Republican margin
- R+38.8 in 1980MIT Election Lab
- Most similar
- State House District 30, UT · twin score 95.5
presidential history
Party record book
Utah 31st State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1896–2024 · 33 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
William J. Bryan1896
91.0%
557 votes · D+82.0 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 75.8%
Republican
Ronald Reagan1984
66.3%
4,775 votes · R+33.6 · modeled estimate
Runner-up · Ronald Reagan, 1980 · 64.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
7,221votes
55.2% of the vote · D+14.1 · modeled estimate
Runner-up · Joe Biden, 2020 · 6,938 votes
Republican
Mitt Romney2012
5,796votes
54.9% of the vote · R+13.5 · modeled estimate
Runner-up · George W. Bush, 2004 · 5,586 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
+88.1pts D vs U.S.
Place D+82.0 · U.S. R+6.1 · modeled estimate
Runner-up · Woodrow Wilson, 1916 · +32.4 pts
Republican
Ronald Reagan1980
+29.1pts R vs U.S.
Place R+38.8 · U.S. R+9.7 · modeled estimate
Runner-up · William H. Taft, 1912 · +19.5 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Utah 31st State House District sits in the Mountain West. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 82.0 points in 1896 and a Republican high of 38.8 points in 1980. Between 2020 and 2024 the district moved 1.7 points toward the Republican candidate; the 2024 margin was 14.1 points.
A population of 45,014, a 49% non-Hispanic-white share, and a median household income of $66,963 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 30 and State House District 37.
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 →
Utah 31st State House District. Akashic. https://akashic.app/sld-lower/49031/. Accessed May 20, 2026. License: CC BY 4.0.