Sielachowskie [ɕɛlaˈxɔfskʲɛ] is a village in the administrative district of Gmina Wasilków, within Białystok County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 4 kilometres (2 mi) west of Wasilków and 10 km (6 mi) north of the regional capital Białystok.
