- Lead
- 8,816
- Total
- 19,204
- vs nation
- R+44.4
Oklahoma 31st State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 8,021
- Total
- 17,658
- vs nation
- R+49.9
- Lead
- 7,774
- Total
- 15,358
- vs nation
- R+52.7
- Lead
- 6,255
- Total
- 12,741
- vs nation
- R+52.9
- Lead
- 5,892
- Total
- 13,646
- vs nation
- R+50.4
- Lead
- 5,432
- Total
- 11,270
- vs nation
- R+45.7
- Lead
- 3,319
- Total
- 8,821
- vs nation
- R+38.1
- Lead
- 1,510
- Total
- 8,321
- vs nation
- R+26.7
Key facts
- 2024 presidential margin
- R+45.9MIT Election Lab
- Population
- 39,8712024 5-year
- Population density
- 215 / sq mi2024 5-year · TIGER/Line
- Land area
- 186 sq miTIGER/Line
- Median household income
- $89,3402024 5-year
- White (non-Hispanic)
- 73.8%2024 5-year
- Black
- 4.5%2024 5-year
- Hispanic / Latino
- 9.2%2024 5-year
- Peak Democratic margin
- D+10.3 in 1932MIT Election Lab
- Peak Republican margin
- R+52.9 in 1928MIT Election Lab
- Most similar
- State House District 20, OK · twin score 98.5
presidential history
Party record book
Oklahoma 31st State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1908–2024 · 30 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1932
55.1%
3,428 votes · D+10.3 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 49.4%
Republican
Herbert Hoover1928
75.8%
4,405 votes · R+52.9 · modeled estimate
Runner-up · Mitt Romney, 2012 · 74.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
4,997votes
26.0% of the vote · R+45.9 · modeled estimate
Runner-up · Joe Biden, 2020 · 4,607 votes
Republican
Donald Trump2024
13,813votes
71.9% of the vote · R+45.9 · modeled estimate
Runner-up · Donald Trump, 2020 · 12,628 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
Franklin D. Roosevelt1932
−7.5pts D vs U.S.
Place D+10.3 · U.S. D+17.8 · modeled estimate
Runner-up · John W. Davis, 1924 · −10.0 pts
Republican
Mitt Romney2012
+52.9pts R vs U.S.
Place R+49.1 · U.S. D+3.9 · modeled estimate
Runner-up · Donald Trump, 2016 · +52.7 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Oklahoma 31st State House District sits in the Southern Plains. In 2024 it voted Republican.
Across the recorded series it reached a Democratic high of 10.3 points in 1932 and a Republican high of 52.9 points in 1928. The 2024 margin was 45.9 points.
A population of 39,871, a 74% non-Hispanic-white share, and a median household income of $89,340 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 20 and State House District 15.
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 →
Oklahoma 31st State House District. Akashic. https://akashic.app/sld-lower/40031/. Accessed May 20, 2026. License: CC BY 4.0.