Potrubowszczyzna [pɔtrubɔfʂˈt͡ʂɨzna] is a village in the administrative district of Gmina Sidra, within Sokółka County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 4 kilometres (2 mi) north-east of Sidra, 20 km (12 mi) north of Sokółka, and 55 km (34 mi) north of the regional capital Białystok.