Dmusy [ˈdmusɨ] is a village in the administrative district of Gmina Biała Piska, within Pisz County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 10 kilometres (6 mi) north-east of Biała Piska, 27 km (17 mi) east of Pisz, and 113 km (70 mi) east of the regional capital Olsztyn.