Pieńki [ˈpjɛɲki] 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 2 kilometres (1 mi) north-east of Michałowo and 31 km (19 mi) east of the regional capital Białystok.