Ostryńskie [ɔsˈtrɨɲskʲɛ] is a village in the administrative district of Gmina Płaska, within Augustów County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Belarus. It lies approximately 16 kilometres (10 mi) south-east of Płaska, 31 km (19 mi) east of Augustów, and 79 km (49 mi) north of the regional capital Białystok.