Serski Las [ˈsɛrski ˈlas] 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 6 kilometres (4 mi) north-west of Płaska, 17 km (11 mi) north-east of Augustów, and 91 km (57 mi) north of the regional capital Białystok.