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.

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.

Primary elections Democratic primary

The Ohio Democratic primary was held on March 19, 2024, alongside the Arizona, Illinois, and Kansas primaries.

President Joe Biden won every county and 87.06% of the vote, but, despite having already dropped out, U.S. Representative Dean Phillips won three delegates. Congressman Phillips was still on the ballot on election day, and gained his delegates by meeting the 15% threshold of votes needed to receive a delegate in a congressional district in the state's 2nd, 6th, and 14th districts.

Republican primary

The Ohio Republican primary was held on March 19, 2024, alongside primaries in Arizona, Florida, and Illinois.

General election Predictions SourceRankingAs of Cook Political Report December 19, 2023 Inside Elections April 26, 2023 Sabato's Crystal Ball June 13, 2024 Decision Desk HQ/The Hill December 14, 2023 CNalysis November 4, 2024 CNN January 14, 2024 The Economist November 1, 2024538 June 11, 2024 NBC News October 6, 2024 YouGov November 1, 2024 Split Ticket November 1, 2024

Democratic ballot access controversy Due to the Democratic National Convention taking place on August 19, 2024, which occurred more than a week after the August 7 deadline to certify a presidential candidate for office, under ordinary rules, the eventual Democratic nominee would be disqualified from the ballot. Efforts to create an emergency fix had stalled in the Ohio Legislature. The state House adjourned without considering a fix on May 8. On May 21, Ohio Secretary of State Frank LaRose provided an update confirming that efforts to rectify the situation were at an impasse, as the state legislature would not take up the issue and the Ohio Democratic Party had offered no "legally acceptable remedy" up to that point. He further clarified that if the party did not work toward a solution themselves, their presidential nominee would not be listed on the November ballot.

On May 23, Governor Mike DeWine called for a special legislative session and tasked lawmakers with ensuring Biden's inclusion on the ballot. Republican leaders in the state senate, with DeWine's support, hoped to pass a bill that will tie solving the ballot access issue to a ban on foreign contributions toward ballot measure efforts in the state. Ohio Democratic Party chair Elizabeth Walters and state House minority leader Allison Russo had signaled their opposition to the ban, which was described as a poison pill amendment; a spokesperson for DeWine later said that a bill dealing only with the ballot access issue could also be considered.

After the state legislature appeared to be unable to address the issue, the Democratic Party announced on May 28 that a virtual roll call nomination, similar to the process used by the party in 2020, would take place two weeks before the 2024 Democratic National Convention to nominate Biden and meet Ohio's deadline. Nonetheless, the Ohio legislature passed a bill on June 1 extending the deadline to August 23, which DeWine signed on June 2. However, because the law did not take effect until September 1, Democrats continued with the roll call to meet the original deadline.

Green Party ballot access controversy Green Party nominee Jill Stein also appeared on the ballot, though votes for her did not count, due to her nominating a running mate after the state deadline. Citing the law that allowed Joe Biden to be nominated, the Green Party attempted to use this exact ruling in their favor to swap VP candidates. However, VP candidate Anita Rios testified in federal court that she had not signed the withdraw form, and that someone unknown to the Stein campaign had submitted a forgery of her signature. The Green Party argued that the Secretary of State should never have accepted the withdraw letter, saying the signature of Rios was a PDF copy from her 2014 governorship candidacy paperwork. The Stein campaign stated that a letter to the Ohio Secretary of State requesting removal from the ballot was "fraudulent".

A hearing to restore ballot access for Stein was scheduled for October 22, in which the federal courts abstained from making a ruling on the case. The Stein campaign and the Ohio Green Party announced that they would continue the lawsuit to make the votes for Stein-Rios in Ohio count. The court, however, ruled the withdraw of the candidate as legitimate and the Secretary of State ordered county Board of Elections to no count any vote for Stein.

Polling Donald Trump vs. Kamala Harris

Aggregate polls Source of pollaggregationDatesadministeredDatesupdatedKamalaHarrisDonaldTrump Other /UndecidedMargin270ToWinOctober 22 – November 4, 2024November 4, 202444.3%52.0%3.7%Trump +7.7%538through November 4, 2024November 4, 202443.4%52.3%4.3%Trump +8.8%The Hill/DDHQthrough November 3, 2024November 3, 202444.6%52.2%3.2%Trump +7.6%Average44.1%52.2%3.7%Trump +8.1%

Poll source Date(s)administered Samplesize Marginof error DonaldTrump KamalaHarris Other /UndecidedAtlasIntelNovember 3–4, 20241,022 (LV)± 3.0%54%45%1%Trafalgar Group (R)November 2–4, 20241,095 (LV)± 2.9%52%45%3%Emerson CollegeOctober 30 − November 2, 2024900 (LV)± 3.2%54%42%4%54.7%43.5%1.9%Morning ConsultOctober 23 − November 1, 20241,254 (LV)± 3.0%53%44%3%Trafalgar Group (R)October 25–28, 20241,127 (LV)± 2.9%52%46%2%ActiVoteOctober 5−28, 2024400 (LV)± 4.9%54%46%–CES/YouGovOctober 1–25, 20243,120 (A)–52%45%3%3,091 (LV)52%45%3%J.L. PartnersOctober 22−24, 2024997 (LV)± 3.1%53%44%3%University of AkronSeptember 12 – October 24, 20241,241 (RV)± 2.8%51%44%5%Bowling Green State University/YouGovOctober 10−21, 20241,000 (LV)± 3.6%50%43%5%Morning ConsultOctober 6−15, 20241,243 (LV)± 3.0%52%45%3%Rasmussen Reports (R)October 9−14, 20241,051 (LV)± 3.0%51%44%5%Washington PostOctober 3–7, 20241,002 (RV)± 3.5%51%44%5%1,002 (LV)51%45%4%Marist CollegeOctober 3–7, 20241,511 (RV)± 3.0%52%46%2%1,327 (LV)± 3.2%52%46%2%ActiVoteAugust 28 – September 30, 2024400 (LV)± 4.9%54%46%–Bowling Green State University/YouGovSeptember 18–27, 20241,000 (LV)± 3.6%51%44%5%New York Times/Siena CollegeSeptember 21–26, 2024687 (RV)± 4.0%49%45%6%687 (LV)50%44%6%RMG ResearchSeptember 18−20, 2024757 (LV)± 3.5%54%43%3%Morning ConsultSeptember 9−18, 20241,488 (LV)± 3.0%52%43%5%Morning ConsultAugust 30 – September 8, 20241,558 (LV)± 3.0%52%44%4%Emerson CollegeSeptember 3–5, 2024945 (LV)± 3.1%53%43%4%54%45%1%SoCal Strategies (R)August 31 – September 1, 2024600 (LV)–52%43%5% August 23, 2024 Robert F. Kennedy Jr. suspends his presidential campaign and endorses Donald Trump.ActiVoteAugust 2–22, 2024400 (LV)± 4.9%56%44%– August 19–22, 2024 Democratic National ConventionRasmussen Reports (R)August 13–17, 20241,267 (LV)–51%44%5% August 6, 2024 Kamala Harris selects Gov. Tim Walz as her running mate.Fabrizio Ward (R)/Impact Research (D)July 23–28, 2024600 (LV)± 4.0%52%42%6% July 21, 2024 Joe Biden announces his withdrawal from the race; Kamala Harris declares her candidacy for president. July 15–19, 2024 Republican National Convention July 13, 2024 attempted assassination of Donald TrumpOhio Northern UniversityMarch 6–11, 20241,241 (LV)± 3.3% 51%38%11%

Donald Trump vs. Kamala Harris vs. Cornel West vs. Jill Stein vs. Chase Oliver Poll source Date(s)administered Samplesize Marginof error DonaldTrump KamalaHarris CornelWest JillStein ChaseOliver Other /UndecidedAtlasIntelNovember 3–4, 20241,022 (LV)± 3.0%54%45%–1%0%–FocaldataOctober 3 – November 1, 20242,161 (LV)–53%44%–0%1%2%1,867 (RV)± 2.1%52%45%–0%2%1%2,161 (A)–53%42%–0%2%3%OnMessage Inc. (R)October 19–22, 2024600 (LV)± 4.0%52%44%–1%1%2%New York Times/Siena CollegeSeptember 21–26, 2024687 (RV)± 4.0%47%44%–2%2%5%687 (LV)49%43%–2%2%4%

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Donald Trump vs. Kamala Harris vs. Robert F. Kennedy Jr. vs. Cornel West vs. Jill Stein vs. Chase Oliver Poll source Date(s)administered Samplesize Marginof error DonaldTrump KamalaHarris Robert F.Kennedy Jr. CornelWest JillStein ChaseOliver Other /UndecidedMiami UniversityOctober 28–30, 2024859 (RV)± 5.0%49%46%0%–0%0%5%851 (LV)50%47%0%–0%0%3%Rasmussen Reports (R)August 13–17, 20241,267 (LV)–50%42%4%1%0%–3%Fabrizio Ward (R)/Impact Research (D)July 23–28, 2024600 (LV)± 4.0%48%39%9%–1%1%2%

Donald Trump vs. Joe Biden

Poll source Date(s)administered Samplesize Marginof error DonaldTrump JoeBiden Other /UndecidedNational Public AffairsMay 28–29, 2024801 (LV)± 3.5%54%46%–John Zogby StrategiesApril 13–21, 2024643 (LV)–52%42%6%Mainstreet Research/Florida Atlantic UniversityMarch 13–15, 2024818 (RV)± 3.4%51%40%9%Ohio Northern UniversityMarch 6–11, 20241,241 (LV)± 3.3% 50%38%12%Emerson CollegeMarch 7–10, 20241,300 (RV)± 2.6%50%41%9%55%45%–Emerson CollegeJanuary 23–25, 20241,844 (RV)± 2.3% 47%36%17%Emerson College/WJW-TVNovember 10–13, 20231,000 (RV)± 3.0% 50%38%12%Data for Progress (D)October 31 – November 2, 2023597 (LV)± 4.0% 51%43%6%Ohio Northern UniversityOctober 16–19, 2023668 (RV)± 3.8% 45%40%15%Emerson CollegeOctober 2–4, 2023438 (RV)± 4.5%45%33%23%Change Research (D)/Future Majority (D)September 16–19, 20231,559 (RV)–48%43%9%Ohio Northern UniversityJuly 17–26, 2023675 (RV)± 3.7%49%39%12%Targoz Market ResearchNovember 2–6, 2022505 (LV)± 4.3%57%40%3%Emerson CollegeOctober 30 – November 1, 20221,000 (LV)± 3.0%50%38%12%Ohio Northern University/LucidOctober 11–15, 2022668 (LV)–55%35%10%Emerson CollegeOctober 6–7, 20221,000 (LV)± 3.0%48%40%12%Emerson CollegeSeptember 12–13, 20221,000 (LV)± 3.0%50%40%10%Echelon InsightsAugust 31 – September 7, 2022831 (LV)± 4.3%49%41%10%Emerson CollegeAugust 15–16, 2022925 (LV)± 3.2%53%39%8%PEM Management Corporation (R)July 22–24, 2022300 (LV)± 5.7%42%44%14%

Donald Trump vs. Joe Biden vs. Robert F. Kennedy Jr. vs. Cornel West vs. Jill Stein