Słucz-Kolonie [ˈswut͡ʂ kɔˈlɔɲɛ] is a village in the administrative district of Gmina Radziłów, within Grajewo County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 4 kilometres (2 mi) west of Radziłów, 27 km (17 mi) south of Grajewo, and 64 km (40 mi) north-west of the regional capital Białystok.