U.S. House seat · lines in effect since 2026
Ohio's 15th District
A district of about 811,000 people, 33% of adults with a bachelor's degree. It votes R+9.4 relative to the nation for president.
Source: 2026 results: Ohio Secretary of State; boundaries: Census Bureau TIGER/LineUpdated Nov 7, 2026, 3:01 PM ET
Where it sits among all 435 seats
Every U.S. House seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Labels below the bar mark 14 other seats in Ohio.
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2016 | 2018 | 2024 | 2026 | |
|---|---|---|---|---|
| U.S. Senate | R+17.1 | D+12.8 | R+33.6 | No race |
| Governor | No race | D+5.0 | No race | No race |
| U.S. House | No race | No race | No race | D+6.6 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: Ohio Secretary of StateUpdated Nov 7, 2026, 3:01 PM ET
Who lives here, compared
Grey bars show the spread of all 435 seats. Small marks are other seats in Ohio. The black marker is OH-15.
Lower than 55% of seats.
Higher than 79% of seats.
Lower than 76% of seats.
Higher than 65% of seats.
Higher than 56% of seats.
Less dense than 52% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean. 3 of the 4 flipped this year.
MI-433% college gradsR+5.2Flipped DOH-8
35% college gradsR+15.6Held RKY-6
37% college gradsR+13.8Flipped DPA-10
35% college gradsR+4.9Flipped D
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Who has held it
These lines took effect in 2026.
- Don Leonard (D)
2027– · Won 2026 by 6.6
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)