Samninkai is a village in Trakai District Municipality, in Vilnius County, Lithuania. Samninkai lies at 139 m above sea level. It has 38 inhabitants (2021). The nearest city is Alytus, 41 km to the west. Among the landmarks around are Trakai Island Castle (26 km), Basilica of the Visitation of the Blessed Virgin Mary (25 km) and Trakai Kenesa (25 km).