Petkėniškės is a village in Trakai District Municipality, in Vilnius County, Lithuania. Petkėniškės lies at 168 m above sea level. It has 22 inhabitants (2021). The nearest city is Vilnius, 29 km to the east. Among the landmarks around are Trakai Island Castle (6.3 km), Vilnius Cathedral (29 km) and National Museum of Lithuania (30 km).