Ohio's 33rd senatorial district has historically been based in the Mahoning Valley. It now consists of the counties of Columbiana and Mahoning. It encompasses Ohio House of Representatives districts , and . It has a Cook PVI of D+12. The district was represented by the Senate President from 1983 to 1984 with Senator Harry Meshel. Its current Ohio Senator is Republican Michael Rulli. He resides in Salem, a city located in Columbiana and Mahoning counties.