2024 United States presidential election in Ohio

The 2024 United States presidential election in Ohio was held on Tuesday, November 5, 2024, as part of the 2024 United States presidential election in which all 50 states plus the District of Columbia participated. Ohio voters chose electors to represent them in the Electoral College via a popular vote. Ohio had 17 electoral votes in the Electoral College, following reapportionment due to the 2020 United States census in which the state lost a seat.

Republican Donald Trump ultimately won Ohio for the third straight election, defeating Democrat Kamala Harris by 11.21%, the widest presidential margin of victory in the state since fellow Republican Ronald Reagan's 18.76% in 1984. Trump became the third presidential candidate to carry Ohio three times, following Franklin D. Roosevelt (the only previous candidate with three consecutive victories here) and Richard Nixon. Prior to the election, all major news organizations considered Ohio a state Trump would once again win, or a likely red state. A former bellwether and swing state, Ohio has not voted for a Democratic nominee for president since Barack Obama in 2012. No Republican has ever won the presidency without winning Ohio. Since 2012, Ohio has been trending towards the GOP. The state is currently moderately to strongly Republican. Trump's 2024 statewide victory was the first double-digit win at the presidential level for Ohio since Republican George H. W. Bush's 10.85% in 1988. Ohio was the home state of Trump's running mate JD Vance. At the previous presidential election in 2020, Trump won Ohio over Joe Biden, the first time a candidate won Ohio but not the presidency since Nixon's contest against John F. Kennedy in 1960.

The election was held concurrently with a U.S. Senate race in Ohio, in which Republican nominee Bernie Moreno unseated Democratic incumbent Sherrod Brown, which was partly credited to Trump's overall success in the state. Additionally, an attempt to establish a redistricting commission (with the goal of ending gerrymandering) was proposed on the state's ballot but was defeated. Trump's denouncement of this is also perceived as having had an influence on this, amongst a number of other factors.