Olišanka is a village in Ukmergė District Municipality, in Vilnius County, Lithuania. Olišanka lies at 140 m above sea level. The nearest city is Ukmergė, 11.4 km to the north. Among the landmarks around are Church of St. Peter and St. Paul (11.7 km), Siesikai Castle (23 km) and Orthodox church of the Resurrection of Jesus Christ in Ukmergė (11.8 km). Among the natural features are Žuvintė spring (8.7 km).