Bäck is a settlement in Gävle Municipality, in Gävleborg County, Sweden. Bäck lies at 36 m above sea level. The nearest city is Gävle, 9.0 km to the east. Among the landmarks around are Swedish Railway Museum (10.3 km), Heliga Trefaldighets kyrka (8.6 km) and Gävle Theatre (9.0 km).