Byske is a locality in Skellefteå Municipality, in Västerbotten County, Sweden. Byske lies at 9 m above sea level. It has 1,741 inhabitants (2023). The nearest city is Skellefteå, 25 km to the southwest. Among the landmarks around are Byske Church (1.1 km), Kåge Church (16.7 km) and Gravfält (17.1 km).