Ostroh may refer to:
Ostroh, a historic city in Rivne Oblast, Ukraine Uherský Ostroh, a town in Zlín Region, Czech Republic Ostroh Raion, a former raion of Rivne Oblast, Ukraine National University of Ostroh Academy, an autonomous research university in Ukraine Ostroh Castle, a castle in Ostroh, Ukraine Ostroh Academy, a former academy in Ostróg, Polish–Lithuanian Commonwealth
See also Ostrog (disambiguation)