Dubasiewszczyzna [dubaɕɛfʂˈt͡ʂɨzna] is a village in the administrative district of Gmina Suchowola, within Sokółka County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 6 kilometres (4 mi) south-east of Suchowola, 28 km (17 mi) north-west of Sokółka, and 49 km (30 mi) north of the regional capital Białystok.