Bäck is a village in Robertsfors Municipality, in Västerbotten County, Sweden. Bäck lies at 24 m above sea level. The nearest city is Umeå, 43 km to the southwest. Beaches nearby: Killingsand (11 km). Among the landmarks around are Bygdeå Church (4.3 km), Robertsfors kyrka (9.9 km) and Västerbottens Museum (42 km).