Lappträsk is a village in Haparanda Municipality, in Norrbotten County, Sweden. Lappträsk lies at 48 m above sea level. The nearest city is Luleå, 80 km to the west. Among the landmarks around are Karl Gustavs kyrka, Norrbotten (20 km), Morjärvs kyrka (9.2 km) and Hietaniemi Church (22 km).