Vaickūniškės is a village in Trakai District Municipality, in Vilnius County, Lithuania. Vaickūniškės lies at 150 m above sea level. It has 105 inhabitants (2021). The nearest city is Alytus, 33 km to the west. Among the landmarks around are Trakai Island Castle (31 km), Raižiai Mosque (23 km) and Basilica of the Visitation of the Blessed Virgin Mary (31 km).