General elections for the Ohio House of Representatives took place on November 3, 2026. The primary was on May 5, 2026.

Following the election, Republicans maintained a majority.

Heading into the election, Republicans had a 65-34 majority. All districts were up for election in 2026. In Ohio, a supermajority, which allows the party in power to override the governor's vetoes, exists when one party holds at least 60 House seats. Republicans gained a supermajority in 2012, when they won 60 out of 99 House seats.

Democrats won at least 42 seats in the 2026 election, breaking the Republican supermajority in Ohio.

Democrats targeted the chamber in order to break the Republican supermajority. Democrats needed to win at least six Republican districts, while maintaining their own, to break the supermajority. The Democratic Legislative Campaign Committee (DLCC) targeted 11 districts, including three that Democrats already held. DLCC President Heather Williams said, "2026 is shaping up to be a historic election year, and the DLCC is all hands on deck to break the GOP supermajority in Ohio that has been in power for over a decade."

The Republican State Leadership Committee (RSLC) included Ohio in its Core Republican Chambers list. RSLC President Edith Jorge-Tuñón said, "These chambers represent durable governing majorities, deeply rooted political alignment, and a significant share of the party’s overall legislative strength nationwide, making them essential to preserving long-term balance across the map."

Ballotpedia considered 11 districts to be battlegrounds. These included districts that had a margin of victory within five percentage points in 2024, DLCC targets, and districts with election forecast ratings of Tilt D/R, Lean D/R, or Likely D/R. Democrats represented three battlegrounds and Republicans represented eight. Four districts were open. The other districts had an incumbent running.

Heading into the 2026 election, Ohio had a Republican trifecta, meaning Republicans held control of the governorship and had majorities in both chambers of the state legislature. Although Republicans maintained their majority in the House, they lost their trifecta in Ohio because Amy Acton (D) won the gubernatorial election.

The Ohio House of Representatives was one of 88 state legislative chambers with elections in 2026. There were 99 chambers throughout the country.