Kinnbäck is a hamlet in Skellefteå Municipality, in Västerbotten County, Sweden. Kinnbäck lies at 17 m above sea level. The nearest city is Piteå, 28 km to the north. Among the landmarks around are Byske Church (16.8 km), Finnträsk Church (18.9 km) and Piteå City Church (28 km). Among the natural features are Trutgrundet (5.4 km).