Psunj is a
mountain in the southwestern
Slavonia region in eastern
Croatia. It is the highest mountain of Slavonia, with the highest peak of Brezovo polje at 984
m.a.s.l. In the north it extends to
Ravna gora and
Papuk, while otherwise it is surrounded by lowlands. It is located north of
Nova Gradiška and southeast of
Pakrac.