Moniai is a village in Trakai District Municipality, in Vilnius County, Lithuania. Moniai lies at 121 m above sea level. The nearest city is Vilnius, 38 km to the east. Among the landmarks around are Trakai Island Castle (14.6 km), Basilica of the Visitation of the Blessed Virgin Mary (14.6 km) and Trakai Kenesa (14.5 km).