Plakna is a village in Trakai District Municipality, in Vilnius County, Lithuania. Plakna lies at 149 m above sea level. The nearest city is Vilnius, 22 km to the northeast. Among the landmarks around are Trakai Island Castle (12.0 km), Vilnius Cathedral (23 km) and National Museum of Lithuania (23 km). Among the natural features are Tauras Hill (22 km).