- Lead
- 11,096
- Total
- 65,908
- vs nation
- R+15.4
Indiana 15th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 11,648
- Total
- 67,934
- vs nation
- R+21.6
- Lead
- 16,334
- Total
- 59,267
- vs nation
- R+29.6
- Lead
- 14,960
- Total
- 58,840
- vs nation
- R+29.3
- Lead
- 7,966
- Total
- 59,156
- vs nation
- R+20.7
- Lead
- 18,545
- Total
- 51,975
- vs nation
- R+33.2
- Lead
- 15,382
- Total
- 45,624
- vs nation
- R+34.2
- Lead
- 10,750
- Total
- 44,130
- vs nation
- R+32.9
Key facts
- 2024 presidential margin
- R+16.8MIT Election Lab
- Population
- 138,2522024 5-year
- Population density
- 1,713 / sq mi2024 5-year · TIGER/Line
- Land area
- 80.7 sq miTIGER/Line
- Median household income
- $79,8962024 5-year
- White (non-Hispanic)
- 78.0%2024 5-year
- Black
- 7.1%2024 5-year
- Hispanic / Latino
- 5.7%2024 5-year
- Peak Democratic margin
- D+20.9 in 1912MIT Election Lab
- Peak Republican margin
- R+46.6 in 1956MIT Election Lab
- Most similar
- State Senate District 16, IN · twin score 93.6
presidential history
Party record book
Indiana 15th 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
Samuel J. Tilden1876
60.3%
2,791 votes · D+20.7 · modeled estimate
Runner-up · Grover Cleveland, 1884 · 58.5%
Republican
Dwight D. Eisenhower1956
73.2%
24,952 votes · R+46.6 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 70.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
27,385votes
40.3% of the vote · R+17.1 · modeled estimate
Runner-up · Kamala Harris, 2024 · 26,834 votes
Republican
Donald Trump2020
39,033votes
57.5% of the vote · R+17.1 · modeled estimate
Runner-up · Donald Trump, 2024 · 37,930 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
Grover Cleveland1892
+16.2pts D vs U.S.
Place D+17.9 · U.S. D+1.7 · modeled estimate
Runner-up · William J. Bryan, 1908 · +12.0 pts
Republican
George W. Bush2000
+34.2pts R vs U.S.
Place R+33.7 · U.S. D+0.5 · modeled estimate
Runner-up · Wendell Willkie, 1940 · +33.7 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2024 | R | 41.3%22,467 | 58.7%31,902 | 54,369 |
With a 16.8-point Republican presidential margin, this district ranks among the state's most reliably one-sided constituencies. Legislative races here rarely draw competitive general-election contests, making primary turnout the dominant electoral force.
Across the recorded series it reached a Democratic high of 20.9 points in 1912 and a Republican high of 46.6 points in 1956. The 2024 margin was 16.8 points.
A population of 138,252, a 78% non-Hispanic-white share, and a median household income of $79,896 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 16 and State Senate District 32.
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 15th State Senate District. Akashic. https://akashic.app/sld-upper/18015/. Accessed May 20, 2026. License: CC BY 4.0.