Ohio's 12th senatorial district

Ohio's 12th
State Senate district

Senator
  Susan Manchester
RWaynesfield
Demographics88% White
6.2% Black
2.3% Hispanic
1% Asian
1.8% Native American
0.3% Hawaiian/Pacific Islander
Population (2020)
 • Voting age
 • Citizens of voting age
344,252
262,250
257,573

Ohio's 12th senatorial district has been based in rural western Ohio. It comprises the counties of Allen, Mercer, Shelby, Champaign as well as portions of Auglaize, Darke and Logan counties. It encompasses Ohio House districts 4, 84 and 85. It has a Cook PVI of R+29. Its Ohio Senator is Republican Susan Manchester.