Wejsuny (Polish pronunciation: [vɛjˈsunɨ]; German: Weissuhnen) is a village in the administrative district of Gmina Ruciane-Nida, within Pisz County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 8 kilometres (5 mi) north-east of Ruciane-Nida, 16 km (10 mi) north-west of Pisz, and 75 km (47 mi) east of the regional capital Olsztyn.

The village has a population of 380.