Bundzai is a village in Šakiai District Municipality, in Marijampolė County, Lithuania. Bundzai lies at 63 m above sea level. It has 42 inhabitants (2021). The nearest city is Kaunas, 49 km to the east. Near the border: Russia, 24 km. Among the landmarks around are Panemunė Castle (14.3 km), Christmemel (18.1 km) and Church of the Assumption, Veliuona (9.7 km).