1924 United States presidential election in Ohio

The 1924 United States presidential election in Ohio was held on November 4, 1924 as part of the 1924 United States presidential election. State voters chose twenty-four electors to the Electoral College, who voted for president and vice president.

Ohio was won decisively by the Republican Party candidate, incumbent President Calvin Coolidge with 58.33 percent of the popular vote. The Democratic Party candidate, John W. Davis, garnered only 23.70 percent of the popular vote.

The 1920s were a fiercely Republican decade in American politics, and Ohio in that era was a fiercely Republican state in presidential elections. The economic boom and good feelings of the Roaring Twenties under popular Republican leadership virtually guaranteed Calvin Coolidge an easy win in the state against the conservative Southern Democrat John Davis, who had little appeal in Northern states like Ohio where his reticence on the Ku Klux Klan was opposed by Catholics. Ohio did possess a very powerful Ku Klux Klan organization which had swept the state's elected offices in the previous year, but had a sufficiently large Catholic population that its delegates to the Democratic National Convention demanded an anti-KKK plank. Davis was also handicapped by a complete lack of support from local Democratic officeholders, despite efforts to campaign in the state in October.

Coolidge won a strong majority statewide even with the Republican vote being split by the strong third party candidacy of Senator Robert M. La Follette, who ran as the Progressive Party candidate and peeled away the votes of many German Americans and progressive Republicans. Owing to Ohio being the most German of the states immediately north of the boundary with antebellum slave states, Ohio was La Follette's best east of the Mississippi and Illinois Rivers (other than Wisconsin, which was his home state that he won) although his vote share was only one percent above his national figure. Nonetheless, La Follette easily outpolled Davis in the major urban areas of northern Ohio, and carried the city of Cleveland and many precincts elsewhere in Cuyahoga County on the strength of labor union support. To date, this was the best ever showing for the Republican Party in Ohio as no other Republican candidate has been able to match Coolidge's landslide 34.63% margin in the state.