The 2024 Ohio Senate election was held on November 5, 2024, to elect senators in 16 even-numbered districts of the Ohio Senate. Members were elected in single-member constituencies to four-year terms. In addition, there was a special election in District 33 for the remainder of that district's term ending in 2026. These elections were held concurrently with various federal and state elections, including for U.S. president and U.S. Senate.
Seats where the margin of victory was under 10%:
Ohio's 2nd senatorial district has historically represented areas located in northwestern Ohio. It now stretches along the Great Lakes. A multi-county district, it currently comprises Erie, Ottawa and Wood counties, as well as portions of Fulton and Lucas counties. It encompasses Ohio House of Representatives districts 3, 47 and 89. It had a Cook PVI of R+1. The seat had been held by Theresa Gavarone following her appointment in February 2019. She was re-elected in 2024.
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Ohio's 4th senatorial district has been based in southwestern Ohio and now consists of almost all of Butler County. It encompasses Ohio House of Representatives districts 51, 52 and 53. It had a Cook PVI of R+13. The incumbent Ohio senator was Republican George Lang. He was re-elected in 2024.
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Ohio's 6th senatorial district has always been based in Dayton, Ohio. It consists of about two-thirds of Montgomery County. It encompasses Ohio House districts 40, 41 and 42. It had a Cook PVI of R+9. The incumbent Ohio senator was Republican Niraj Antani. Antani declined to run for State Senate again, as he was running for U.S. representative. Ohio State Board of Education member Charlotte McGuire was nominated as the Republican nominee for the district, and state representative from the 38th district, Willis Blackshear Jr., was nominated as the Democratic nominee. Blackshear flipped the district to the Democratic Party in the 2024 general election.
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Ohio's 8th senatorial district has been based in Cincinnati, Ohio and currently comprises the western portion of Hamilton County. It encompasses Ohio House districts 28, 29 and 30. It had a Cook PVI of R+14. The incumbent Ohio senator was Republican Louis Blessing. He was re-elected in 2024.
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Ohio's 10th senatorial district has been based in south-central Ohio. It comprises the Clark, Greene and Madison counties. It encompasses Ohio House districts 73, 74 and 79. It had a Cook PVI of R+7. The incumbent Ohio senator was Republican Bob Hackett. Hackett did not run for re-election. Former state representative from the 79th district, Kyle Koehler, was nominated as the Republican nominee, and Daniel McGregor was nominated as the Democratic nominee. He was elected in the 2024 general election.
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Ohio's 12th senatorial district has been based in rural western Ohio. It comprises Allen, Mercer, Shelby, Champaign counties, as well as portions of Auglaize, Darke and Logan counties. It encompasses Ohio House districts 4, 84 and 85. It had a Cook PVI of R+14. The incumbent Ohio senator was Republican Matt Huffman. Huffman was term-limited, and state representative from the 78th district, Susan Manchester, was nominated as the Republican nominee. She was elected in the 2024 general election.
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Special election caused by the resignation of Michael Rulli.
No primary was held as the Republican candidate was directly nominated by the Carroll, Columbiana, and Mahoning County Republican parties.
No primary was held as the Democratic candidate was directly nominated by the Carroll, Columbiana, and Mahoning County Democratic parties.
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Official campaign websites for 2nd district candidates
Official campaign websites for 4th district candidates
Official campaign websites for 6th district candidates
Official campaign websites for 8th district candidates
Official campaign websites for 10th district candidates
Official campaign websites for 12th district candidates
Official campaign websites for 14th district candidates
Official campaign websites for 16th district candidates
Official campaign websites for 18th district candidates
Official campaign websites for 20th district candidates
Official campaign websites for 22nd district candidates
Official campaign websites for 24th district candidates
Official campaign websites for 26th district candidates
Official campaign websites for 28th district candidates
Official campaign websites for 32nd district candidates