Kosava castle is a ruined castellated palace in Gothic Revival style located in Kosava, Belarus. It was built in 1830 by Graf Wandalin Puslowski close to the palace where Andrzej Tadeusz Bonawentura Kościuszko was born. The architect of the castle was Franciszek Jaszczołd. The ruined castle is similar to a replica of Tadeusz Kościuszko's house in Merechevschina. After the collapse of the January Uprising in 1863, ownership was transferred to the Trubetskoy family and other Russian aristocrats.
During World War I and World War II, the place was severely damaged. Currently, the castle is in the process of restoration.
Coordinates: 52°45′56″N 25°07′18″E / 52.76556°N 25.12167°E