Ohio Election Odds — 2026 Live Betting Odds & Voting History

Ohio was once the most important swing state in the country. It is now one of the most reliably Republican states in the Midwest, having voted for Trump by 8 points in 2020 and 11 points in 2024. The 2026 cycle in Ohio is shaped almost entirely by JD Vance's elevation to the vice presidency in January 2025, which set off a cascade of consequences: Governor Mike DeWine appointed Lieutenant Governor Jon Husted to Vance's Senate seat, Husted abandoned his planned 2026 gubernatorial run, and Vivek Ramaswamy moved from the Department of Government Efficiency to the open Republican primary for governor. The state will hold both a gubernatorial election and a U.S. Senate special election on November 3, and the new GOP-drawn congressional map is expected to add another Republican seat to the House delegation. National 2028 markets and balance-of-power coverage live on the homepage.

Ohio governor betting odds

This is an open seat — Mike DeWine is term-limited after two terms — and the Republican primary on May 5, 2026 produced a decisive result. Vivek Ramaswamy, the biotech entrepreneur and 2024 presidential candidate, won the primary with over 80% of the vote, having cleared what was expected to be a competitive field months earlier through Trump's endorsement and the Ohio Republican Party's official backing. State Attorney General Dave Yost and state Treasurer Robert Sprague both declined to run after evaluating Ramaswamy's strength, and former lieutenant governor Husted left the race entirely after DeWine appointed him to fill Vance's Senate seat in January 2025.

The Democratic nominee is Amy Acton, the former Ohio Department of Health director who became a familiar figure during DeWine's daily COVID press conferences in 2020. Her brief return to public visibility — combined with the unique recognition factor from those briefings — made her the consensus Democratic choice, and she cleared the Democratic field early. Her general election challenge is significant: Democrats have not won an Ohio gubernatorial election since 2006, and Trump won the state by 11 points in 2024.

Prediction markets are pricing Ramaswamy as a strong favorite, with most race ratings landing in the "likely Republican" range. The Acton candidacy creates a real contrast — Ramaswamy as the disruptor running on DOGE-style government cuts, Acton as the public health authority running on protecting institutions — but the structural Republican advantage in Ohio is substantial.

Ohio presidential election betting odds

Ohio voted for the winning presidential candidate in every election from 1964 through 2020, a 56-year streak that earned it the nickname "the bellwether state." That streak technically ended in 2020 when Trump won Ohio but lost nationally. By 2024, Trump's Ohio margin had expanded to 11 points — the state is no longer a bellwether and is no longer a swing state. Cook PVI rates it at R+6, putting it firmly in the Republican column for the foreseeable future.

For 2028, Ohio's 17 electoral votes are essentially locked in for the Republican nominee. The state's significance to 2028 markets comes through Vice President JD Vance, who served as Ohio's senator from 2023 to 2025 and remains the most prominent national Republican from the state. Vance is the current frontrunner in Polymarket's 2028 Republican nominee market, and Ohio-specific polling on his standing — particularly relative to alternative Republicans — generates regular market activity.

Ohio senate betting odds

Ohio has a Senate special election on the 2026 ballot to fill the remainder of JD Vance's term, which expires in January 2029. Jon Husted, appointed by Governor DeWine in January 2025 when Vance became vice president, is the Republican nominee. He faced no credible primary challenge, raised strong fundraising numbers throughout 2025, and has Trump's endorsement. If Husted wins in November 2026, he will need to run again in 2028 for a full term.

The Democratic nominee is Sherrod Brown, who held a Senate seat from 2007 to 2025 before losing his 2024 re-election bid to Bernie Moreno by 4 points. Brown's return to the ballot in 2026 was widely expected — he is among the most prominent Democratic figures in any state where Trump won in 2024, and he had signaled openness to running soon after his 2024 loss. Brown brings universal name recognition and a long record of statewide wins (he held statewide office continuously from 1982 to 2025), but he is also running in a state that has moved significantly to the right since his last win in 2018, and against a Republican appointee with no obvious vulnerabilities.

Prediction markets are pricing the race as competitive but leaning Republican. Brown's path requires either a sharp shift in the political environment, an unforced error from Husted, or both.

Bernie Moreno, the state's other senator, is not on the 2026 ballot. His next election is 2030.

Ohio house betting odds

Ohio has 15 House seats, and the 2026 elections will be the first run under a new Republican-drawn congressional map. The Ohio General Assembly passed the new map in late 2025 over Democratic objections, and Ohio's redistricting commission — the body voters created in 2018 to take partisan politics out of mapmaking — was bypassed because the Legislature failed to reach the bipartisan threshold the system requires.

The new map shifts the delegation from the current 10 Republicans and 5 Democrats toward a likely 11-4 split, with the targeted seat being OH-13 (Emilia Sykes, Akron, narrowly held by Democrats in 2024). Litigation challenging the map proceeded through Ohio courts during early 2026 and did not produce a ruling that would change the boundaries for 2026.

Prediction markets are pricing the Ohio House map alongside the Texas, Florida, and North Carolina maps as part of the broader 2026 redistricting story. Combined, those four states are designed to add roughly 10-11 Republican seats to the House delegation — enough by themselves to potentially preserve the current GOP House majority even if Republicans lose ground elsewhere. The countervailing redistricting in California, which added five Democratic-favorable seats under Proposition 50, partially offsets this.