Republicans how have a record number elected seats in the Ohio House, winning at least 65 districts. The GOP has held 60 seats in the current General Assembly. Since a constitutional amendment established the 99-member House in 1967, the most seats the party had won was 64.
Republican Josh Mandel has defeated Democratic state Rep. Connie Pillich for a second term as Ohio's treasurer.
Mandel successfully campaigned on his accomplishments of investing safely and cutting office costs. His win Tuesday came in one of the year's most competitive contests.
U.S. Sen. Sherrod Brown had defeated Mandel two years ago after a bruising campaign. Revelations during that race that Mandel hired friends into state jobs and repeatedly failed to attend meetings of a key board he chaired contributed to his loss and were seen as advantageous to Pillich.
Republican Sharon Kennedy has been re-elected to the Ohio Supreme Court by defeating Democratic state Rep. Tom Letson.
Kennedy was first elected as one of the high court's seven members in 2012. Before that, she was an administrative judge on the Butler County Domestic Relations Court, a magistrate and a warrant officer.
The 52-year-old from Liberty Township was endorsed by the Ohio affiliates of the National Rifle Association, Fraternal Order of Police, Chamber of Commerce and National Federation of Independent Business, among others.
Republican Dave Yost has defeated Democrat John Patrick Carney to win a second term as Ohio's state auditor.
Yost had been seen as one of the year's most vulnerable incumbents, after winning by a narrow margin four years ago.
He elevated the office's profile during his four-year term through efforts to audit Republican Gov. John Kasich's privatized job-creation office, JobsOhio, and through a statewide investigation of potential attendance tampering at public schools across Ohio.