Ostra
Ostra stands for:
- Ostra (Marche) , a municipality in Italy
- Ostra (Ukraine) , a village in southwestern Ukraine (Ukrainian Остра)
- Ostra Vetere , a municipality in Italy and an ancient Roman settlement
- Ostrá , a municipality in the Czech Republic, Okres Nymburk
- Ostra (municipality of Weinzierl) a cadastral municipality of Weinzierl am Walde, Lower Austria
- Ostra , a former Elbe village near Dresden, later incorporated
- Titular Bishopric Ostra , a titular bishopric
- a tributary of the Opawa in Poland, see Pilšťský potok
- Ostra (Serbia) , a place in Serbia
- Éditions Ostra, see Studio Biederer
- Otto Straznicky , called Ostra, and his Ostra-Bahn , with which he transported 250,000 children
