Wasilków is a town located in north-eastern Poland within the Podlaskie Voivodeship. It is situated in Białystok County and lies approximately 3 km (2 mi) north of the city of Białystok. The town serves as a northern suburb of Białystok and is part of the broader Białystok metropolitan area.
The settlement is positioned along the Supraśl River. As of 2024, Wasilków has a population of 12,831 inhabitants.