Found this on a "Forgotten Ohio" site:
Fairfield - Acme Auto Theater (Gone)
Hamilton - Colonial Drive-In (Dark)
Hamilton - Ramona Drive-In (Dixie Highway and Clinton Avenue; Status Unknown)
Hamilton - Valley Drive-In (2380 Hamilton-Eaton Road; Dark)
Cincinnati - Auto Inn (Anderson Ferry Road; Gone)
Cincinnati - Dent Auto Theater (6231 Harrison Avenue; Gone)
Cincinnati - Ferguson Hills Drive-In (2310 Ferguson Road; Gone)
Cincinnati - Jack's Drive-In (4500 Kellogg Avenue; Dark)
Cincinnati - Jolly Roger Drive-In (Gone)
Cincinnati - Oakley Drive-In (Dark)
Cincinnati - Twin Drive-In Norwood (Norwood; Status Unknown)
Cincinnati - Twin Drive-In Reading (Reading; Gone)
Cincinnati - Woodlawn Drive-In (Springfield Pike; Gone)
Forestville - Forest Auto Drive-In (Route 125; Status Unknown)
Mt. Healthy - Mt. Healthy Drive-In (6 Monroe Drive; Status Unknown)
Mt. Healthy - Park Inn (Compton Road; Gone)
Aberdeen - Riverside Drive-In (Dark)
Mount Orab - Lake Drive-In (SR 68; Dark)
Russellville - East Bend Drive-In (9897 State Route 125; Partially Functional)
http://www.forgottenoh.com/driveinlist.html