Rostki [ˈrɔstki] is a village in the administrative district of Gmina Stawiski, within Kolno County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 4 kilometres (2 mi) south-east of Stawiski, 19 km (12 mi) east of Kolno, and 70 km (43 mi) west of the regional capital Białystok.