Bagniuki [baɡˈɲuki] is a village in the administrative district of Gmina Michałowo, within Białystok County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Belarus. It lies approximately 15 kilometres (9 mi) south-east of Michałowo and 44 km (27 mi) south-east of the regional capital Białystok.