- Lead
- 74,980
- Total
- 132,497
- vs nation
- D+58.1
Ohio 15th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 90,062
- Total
- 145,819
- vs nation
- D+57.3
- Lead
- 85,426
- Total
- 143,917
- vs nation
- D+57.3
- Lead
- 82,034
- Total
- 137,821
- vs nation
- D+55.7
- Lead
- 77,966
- Total
- 134,177
- vs nation
- D+50.8
- Lead
- 60,225
- Total
- 119,924
- vs nation
- D+52.7
- Lead
- 38,573
- Total
- 91,441
- vs nation
- D+41.7
- Lead
- 38,022
- Total
- 88,839
- vs nation
- D+34.3
Key facts
- 2024 presidential margin
- D+56.6MIT Election Lab
- Population
- 350,6902024 5-year
- Population density
- 4,068 / sq mi2024 5-year · TIGER/Line
- Land area
- 86.2 sq miTIGER/Line
- Median household income
- $55,3752024 5-year
- White (non-Hispanic)
- 40.1%2024 5-year
- Black
- 42.9%2024 5-year
- Hispanic / Latino
- 7.8%2024 5-year
- Peak Democratic margin
- D+62.6 in 1876MIT Election Lab
- Most similar
- State Senate District 21, VA · twin score 96.8
presidential history
Party record book
Ohio 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
81.2%
3,008 votes · D+62.6 · modeled estimate
Runner-up · Joe Biden, 2020 · 80.1%
Republican
Dwight D. Eisenhower1956
43.6%
19,161 votes · D+12.9 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 43.1%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
116,849votes
80.1% of the vote · D+61.8 · modeled estimate
Runner-up · Hillary Clinton, 2016 · 110,407 votes
Republican
Ronald Reagan1984
31,334votes
42.1% of the vote · D+13.5 · modeled estimate
Runner-up · George W. Bush, 2004 · 29,631 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
+60.0pts D vs U.S.
Place D+33.8 · U.S. R+26.2 · modeled estimate
Runner-up · Kamala Harris, 2024 · +58.1 pts
Republican
Herbert Hoover1932
−19.3pts R vs U.S.
Place D+37.1 · U.S. D+17.8 · modeled estimate
Runner-up · Richard Nixon, 1968 · −22.8 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 | D | 64.0%95,724 | 36.0%53,915 | 149,639 |
| 2020 | D | 62.5%100,193 | 37.5%60,166 | 160,359 |
Ohio 15th State Senate District sits in the Industrial Midwest. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 62.6 points in 1876. Between 2020 and 2024 the district moved 5.2 points toward the Republican candidate; the 2024 margin was 56.6 points.
A population of 350,690, a 40% non-Hispanic-white share, and a median household income of $55,375 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 21 and State Senate District 7.
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 →
Ohio 15th State Senate District. Akashic. https://akashic.app/sld-upper/39015/. Accessed May 20, 2026. License: CC BY 4.0.