- Lead
- 15,862
- Total
- 55,362
- vs nation
- D+30.1
Indiana 40th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 17,491
- Total
- 59,036
- vs nation
- D+25.2
- Lead
- 13,448
- Total
- 54,822
- vs nation
- D+22.4
- Lead
- 10,921
- Total
- 53,722
- vs nation
- D+16.5
- Lead
- 19,801
- Total
- 59,596
- vs nation
- D+26.0
- Lead
- 4,461
- Total
- 47,299
- vs nation
- D+11.9
- Lead
- 1,061
- Total
- 34,838
- vs nation
- R+3.6
- Lead
- 2,098
- Total
- 37,170
- vs nation
- R+2.9
Key facts
- 2024 presidential margin
- D+28.7MIT Election Lab
- Population
- 133,1732024 5-year
- Population density
- 453 / sq mi2024 5-year · TIGER/Line
- Land area
- 294 sq miTIGER/Line
- Median household income
- $65,3212024 5-year
- White (non-Hispanic)
- 80.0%2024 5-year
- Black
- 3.7%2024 5-year
- Hispanic / Latino
- 4.7%2024 5-year
- Peak Democratic margin
- D+33.2 in 2008MIT Election Lab
- Peak Republican margin
- R+33.2 in 1928MIT Election Lab
- Most similar
- State Senate District 19, MO · twin score 89.7
presidential history
Party record book
Indiana 40th 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
Barack Obama2008
66.0%
39,305 votes · D+33.2 · modeled estimate
Runner-up · Joe Biden, 2020 · 63.9%
Republican
Herbert Hoover1928
66.4%
8,204 votes · R+33.2 · modeled estimate
Runner-up · Richard Nixon, 1960 · 64.8%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
39,305votes
66.0% of the vote · D+33.2 · modeled estimate
Runner-up · Joe Biden, 2020 · 37,741 votes
Republican
George W. Bush2004
21,099votes
44.6% of the vote · D+9.4 · modeled estimate
Runner-up · Mitt Romney, 2012 · 20,776 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
Kamala Harris2024
+30.1pts D vs U.S.
Place D+28.7 · U.S. R+1.5 · modeled estimate
Runner-up · Barack Obama, 2008 · +26.0 pts
Republican
Richard Nixon1960
+30.4pts R vs U.S.
Place R+30.3 · U.S. D+0.2 · modeled estimate
Runner-up · Alf Landon, 1936 · +20.9 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
In 2024 it voted Democratic by D+28.1, against D+33.2 in 2008. The district had about 101,000 residents, 82% White alone in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 33.2 points in 2008 and a Republican high of 33.2 points in 1928. Between 2020 and 2024 the district moved 1.0 points toward the Republican candidate; the 2024 margin was 28.7 points.
A population of 133,173, a 80% non-Hispanic-white share, and a median household income of $65,321 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 19 and State Senate District 2.
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 →
Indiana 40th State Senate District. Akashic. https://akashic.app/sld-upper/18040/. Accessed May 20, 2026. License: CC BY 4.0.