Mańkowizna [maɲkɔˈvizna] is a village in the administrative district of Gmina Juchnowiec Kościelny, within Białystok County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 2 kilometres (1 mi) north-west of Juchnowiec Kościelny and 11 km (7 mi) south of the regional capital Białystok.