- Lead
- 36,456
- Total
- 64,130
- vs nation
- D+58.3
Missouri 9th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 46,129
- Total
- 75,676
- vs nation
- D+56.5
- Lead
- 43,176
- Total
- 73,657
- vs nation
- D+56.5
- Lead
- 47,626
- Total
- 76,966
- vs nation
- D+58.0
- Lead
- 56,277
- Total
- 85,739
- vs nation
- D+58.4
- Lead
- 46,538
- Total
- 77,161
- vs nation
- D+62.8
- Lead
- 41,490
- Total
- 67,480
- vs nation
- D+61.0
- Lead
- 36,967
- Total
- 61,379
- vs nation
- D+51.7
Key facts
- 2024 presidential margin
- D+56.8MIT Election Lab
- Population
- 180,3092024 5-year
- Population density
- 1,981 / sq mi2024 5-year · TIGER/Line
- Land area
- 91 sq miTIGER/Line
- Median household income
- $51,7522024 5-year
- White (non-Hispanic)
- 28.8%2024 5-year
- Black
- 53.9%2024 5-year
- Hispanic / Latino
- 9.8%2024 5-year
- Peak Democratic margin
- D+77.2 in 1876MIT Election Lab
- Most similar
- State Senate District 40, MD · twin score 99.1
presidential history
Party record book
Missouri 9th State Senate 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
88.3%
72,287 votes · D+76.7 · modeled estimate
Runner-up · Samuel J. Tilden, 1876 · 87.5%
Republican
Richard Nixon1972
32.7%
15,139 votes · D+34.6 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 31.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Franklin D. Roosevelt1936
72,287votes
88.3% of the vote · D+76.7 · modeled estimate
Runner-up · Barack Obama, 2008 · 70,776 votes
Republican
Dwight D. Eisenhower1952
15,462votes
24.9% of the vote · D+50.2 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 15,380 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
James M. Cox1920
+72.1pts D vs U.S.
Place D+45.9 · U.S. R+26.2 · modeled estimate
Runner-up · Walter Mondale, 1984 · +67.6 pts
Republican
William H. Taft1912
−44.8pts R vs U.S.
Place D+64.4 · U.S. D+19.5 · modeled estimate
Runner-up · Thomas E. Dewey, 1944 · −46.8 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Missouri 9th State Senate District sits in the Border South. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 77.2 points in 1876. Between 2020 and 2024 the district moved 4.1 points toward the Republican candidate; the 2024 margin was 56.8 points.
A population of 180,309, a 29% non-Hispanic-white share, and a median household income of $51,752 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 40 and State Senate District 45.
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 →
Missouri 9th State Senate District. Akashic. https://akashic.app/sld-upper/29009/. Accessed May 20, 2026. License: CC BY 4.0.