- Lead
- 1,670
- Total
- 19,735
- vs nation
- R+7.0
Missouri 31st State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 2,248
- Total
- 20,225
- vs nation
- R+15.6
- Lead
- 3,651
- Total
- 18,489
- vs nation
- R+21.8
- Lead
- 3,663
- Total
- 18,718
- vs nation
- R+23.4
- Lead
- 2,745
- Total
- 19,834
- vs nation
- R+21.1
- Lead
- 4,346
- Total
- 19,137
- vs nation
- R+20.3
- Lead
- 2,926
- Total
- 16,113
- vs nation
- R+18.7
- Lead
- 2,074
- Total
- 14,824
- vs nation
- R+22.5
Key facts
- 2024 presidential margin
- R+8.5MIT Election Lab
- Population
- 38,7392024 5-year
- Population density
- 2,913 / sq mi2024 5-year · TIGER/Line
- Land area
- 13.3 sq miTIGER/Line
- Median household income
- $90,5042024 5-year
- White (non-Hispanic)
- 77.4%2024 5-year
- Black
- 7.1%2024 5-year
- Hispanic / Latino
- 6.6%2024 5-year
- Peak Democratic margin
- D+21.4 in 1912MIT Election Lab
- Peak Republican margin
- R+51.7 in 1972MIT Election Lab
- Most similar
- State House District 33, MO · twin score 87.0
presidential history
Party record book
Missouri 31st State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1936
54.5%
8,572 votes · D+9.6 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 47.8%
Republican
Richard Nixon1972
75.9%
11,618 votes · R+51.7 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 74.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
8,990votes
45.6% of the vote · R+8.5 · modeled estimate
Runner-up · Joe Biden, 2020 · 8,770 votes
Republican
Dwight D. Eisenhower1952
11,920votes
68.2% of the vote · R+36.6 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 11,836 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 Wilson1912
+1.9pts D vs U.S.
Place D+21.4 · U.S. D+19.5 · a third-party candidate carried the Place · modeled estimate
Runner-up · Kamala Harris, 2024 · −7.0 pts
Republican
Thomas E. Dewey1944
+38.0pts R vs U.S.
Place R+30.5 · U.S. D+7.5 · modeled estimate
Runner-up · Wendell Willkie, 1940 · +34.7 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Missouri 31st State House District sits in the Border South. In 2024 it voted Republican.
Across the recorded series it reached a Democratic high of 21.4 points in 1912 and a Republican high of 51.7 points in 1972. Between 2020 and 2024 the district moved 2.7 points toward the Democratic candidate; the 2024 margin was 8.5 points.
A population of 38,739, a 77% non-Hispanic-white share, and a median household income of $90,504 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 33 and State House District 84.
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 →
Missouri 31st State House District. Akashic. https://akashic.app/sld-lower/29031/. Accessed May 20, 2026. License: CC BY 4.0.