Svirz Castle (Ukrainian: Свірзький замок, romanized: Svirz'kyi zamok, Polish: Zamek w Świrzu) is a fortified aristocratic residence in Svirzh, Lviv Oblast, Ukraine.
It was originally built by the Świrski noble family in the 15th century.
The stronghold was completely rebuilt in the 17th century at the behest of its new owner, Count Aleksander Cetner.
It is believed that General Paweł Grodzicki was responsible for the modernisation of the castle's fortifications.
Though surrounded on all sides by moats, lakes, and marshes, the fort was taken by the rebellious Cossacks on several occasions.