Leśna [ˈlɛɕna] is a village in the administrative district of Gmina Narewka, within Hajnówka County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Belarus. It lies approximately 5 kilometres (3 mi) north-east of Narewka, 22 km (14 mi) north-east of Hajnówka, and 51 km (32 mi) south-east of the regional capital Białystok.