Ohio's 1st senatorial district has historically represented areas located in northwestern Ohio. A multi-county district, it currently comprises the counties Hancock, Hardin, Putnam, Henry, Williams, Defiance, Paulding, and Van Wert and portions of the counties Fulton, Logan, and Auglaize. It encompasses Ohio House districts 81, 82 and 83. It has a Cook PVI of R+11. The current Ohio Senator is Republican Rob McColley. He resides in Napoleon, Ohio, a city located in Henry County.
| Senator | Party | Term | Notes | ||
|---|---|---|---|---|---|
| Howard C. Cook | Republican | January 3, 1967 – December 31, 1974 | Cook defeated in 1974 Republican Primary Election[1] | ||
| M. Ben Gaeth | Republican | January 4, 1975 – December 31, 1998 | Gaeth was not a candidate for re-election in 1998[2] | ||
| Lynn Wachtmann | Republican | January 5, 1999 – December 31, 2006 | Reached term limit after four terms[3] | ||
| Steve Buehrer | Republican | January 2, 2007 – January 15, 2011 | Resigned to become administrator of Ohio Bureau of Workers' Compensation[4] | ||
| Cliff Hite | Republican | February 2, 2011 – October 17, 2017 | Resigned[5] [6] [7] | ||
| Rob McColley | Republican | December 5, 2017 – present | Incumbent |