Ohio State Senate seat · lines in effect since 2024
Ohio Senate District 12
A district of about 337,000 people, 20% of adults with a bachelor's degree. It votes R+56.7 relative to the nation for president.
2024 election
Nov 5, 2024- Susan Manchester (R) · won100.0%
Unopposed.
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
Where it sits among all 33 seats
Every Ohio State Senate 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 election for this seat
15 races since 1968; the seat changed party 1 time. District numbers are redrawn after each census: each group is one set of lines.
| Year | Winner | Runner-up | Won by |
|---|---|---|---|
| Lines first used in 2024 | |||
| 2024 | Susan Manchester (R) | — | Unopposed |
| Lines first used in 2012 | |||
| 2020 | Matt Huffman (R) | Ken Poling (D) | 58.5 |
| 2016 | Matt Huffman (R) | — | Unopposed |
| 2012 | Keith Faber (R) | Paul Hinds (I) | 57.7 |
| Lines first used in 2002 | |||
| 2008 | Keith Faber (R) | Thomas M. Matthew (D) | 37.8 |
| 2004 | Jim Jordan (R) | Jack Kaffenberger Sr. (I) | 58.5 |
| Lines first used in 1992 | |||
| 2000 | Jim Jordan (R) | Jack Kaffenberger Sr. (I) | 65.0 |
| 1996 | Bob Cupp (R) | Jim Clark (D) | 43.4 |
| 1992 | Bob Cupp (R) | Marty Hess (D) | 39.1 |
| Lines first used in 1982 | |||
| 1988 | Bob Cupp (R) | Dale Locker (D) | 30.4 |
| 1984 | Bob Cupp (R) | Steven D. Maurer (D) | 22.0 |
| Lines first used in 1972 | |||
| 1980 | Steven D. Maurer (D)Flip | Richard L. Ditto (R) | 0.1 |
| 1976 | Walter L. White (R) | Steven D. Maurer (D) | 0.1 |
| 1972 | Walter L. White (R) | James L. Gehrlich (D) | 8.4 |
| Lines first used in 1962 | |||
| 1968 | Paul Gillmor (R) | Gene Slagle (D) | 23.2 |
Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Districts that overlap District 12
The state's districts in other chambers that share residents with this one, and the share of District 12's area in each.
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 | 2020 | 2024 | |
|---|---|---|---|---|
| President | R+46.4 | No race | R+47.9 | R+53.6 |
| U.S. Senate | R+54.3 | R+28.6 | No race | R+45.1 |
| Governor | No race | R+44.9 | No race | No race |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 8, 2026, 7:01 PM ET
Who lives here, compared
Grey bars show the spread of all 33 seats. Small marks are other seats in Ohio. The black marker is District 12.
Lower than 97% of seats.
Higher than 91% of seats.
Lower than 81% of seats.
Lower than 72% of seats.
Lower than 88% of seats.
Less dense than 88% 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 17OhioR+51.1Held RDistrict 31
21% college gradsR+42.6Held RDistrict 14
26% college gradsR+43.2Not up in 2026District 30
21% college gradsR+39.1Not up in 2026
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