Začepka is a village in Trakai District Municipality, in Vilnius County, Lithuania. Začepka lies at 136 m above sea level. The nearest city is Alytus, 29 km to the west. Among the landmarks around are Trakai Island Castle (35 km), Raižiai Mosque (17.5 km) and Pilėnai (23 km). Among the natural features are A. Mickevičius oak (7.4 km).