Ohio House of Representatives seat · lines in effect since 2024
Ohio House District 21
A district of about 125,000 people, 47% Black, 39% of adults with a bachelor's degree. It votes D+54.5 relative to the nation for president.
Where it sits among all 99 seats
Every Ohio House of Representatives 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
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 | D+37.1 | D+62.5 | D+57.2 | No race |
| Governor | No race | D+53.4 | No race | No race |
| Ohio House of Representatives | No race | No race | D+58.4 | D+67.3 |
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 99 seats. Small marks are other seats in Ohio. The black marker is District 21.
Higher than 77% of seats.
Lower than 95% of seats.
Lower than 79% of seats.
Higher than 96% of seats.
Higher than 57% of seats.
Denser than 93% 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.
District 2542% Black · 36% college gradsD+66.7Held DDistrict 24
41% Black · 32% college gradsD+45.9Held DDistrict 33
34% Black · 26% college gradsD+44.6Held DDistrict 18
56% Black · 47% college gradsD+78.2Held 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 2024.
- Eric Synenberg (D)
2025– · Won 2024 by 58.4, 2026 by 67.3
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)