Krusznik [ˈkruʂnik] is a village in the administrative district of Gmina Nowinka, within Augustów County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 11 kilometres (7 mi) north-east of Nowinka, 19 km (12 mi) north-east of Augustów, and 98 km (61 mi) north of the regional capital Białystok.