Tjärnbäck is a village in Norsjö Municipality, in Västerbotten County, Sweden. Tjärnbäck lies at 278 m above sea level. The nearest city is Skellefteå, 103 km to the east. Among the landmarks around are Kristineberg Church (15.2 km), Malå Church (21 km) and Björksele Church (16.6 km).