| Ostroh Castle | |
|---|---|
Острозький замок | |
| Ostroh in Ukraine | |
 | |
  Ostroh Castle | |
| Coordinates | 50°19′35″N 26°31′15″E / 50.32639°N 26.52083°E |
| Site information | |
| Condition | Ruined |
| Website | ostrohcastle.com.ua |
The Ostroh Castle (Ukrainian: Острозький замок, Ostroz'kyi zamok, Polish: Zamek w Ostrogu) is a castle in the city of Ostroh, located in the Rivne Oblast of western Ukraine. In the 14th, 15th and 16th centuries, the castle was the key stronghold of the powerful House of Ostroh. Today it is in ruins.