Iowa and Ohio State have not met since at least the 2017 season.
Right now Iowa is 33–23 and Ohio State is 30–25, with Iowa at 153 days since a win against Ohio State's 152.
Full schedules and drought counters: Iowa Hawkeyes and Ohio State Buckeyes.
Iowa vs Illinois, Iowa vs Indiana, Iowa vs Maryland, Iowa vs Michigan, Iowa vs Michigan State, Iowa vs Minnesota, Iowa vs Nebraska, Iowa vs Northwestern, Iowa vs Oregon, Iowa vs Penn State, Iowa vs Purdue, Iowa vs Rutgers, Iowa vs UCLA, Iowa vs USC, Iowa vs Washington.
Ohio State vs Illinois, Ohio State vs Indiana, Ohio State vs Maryland, Ohio State vs Michigan, Ohio State vs Michigan State, Ohio State vs Minnesota, Ohio State vs Nebraska, Ohio State vs Northwestern, Ohio State vs Oregon, Ohio State vs Penn State, Ohio State vs Purdue, Ohio State vs Rutgers, Ohio State vs UCLA, Ohio State vs USC, Ohio State vs Washington.