Mieleszki-Kolonia [mjɛˈlɛʂki kɔˈlɔɲa] is a village in the administrative district of Gmina Gródek, within Białystok County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Belarus. It lies approximately 6 kilometres (4 mi) south-east of Gródek and 36 km (22 mi) east of the regional capital Białystok.