Olszyna [ɔlˈʂɨna] is a village in the administrative district of Gmina Hajnówka, within Hajnówka County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Belarus. It lies approximately 7 kilometres (4 mi) south of Hajnówka and 56 km (35 mi) south-east of the regional capital Białystok.