Seskarö is a locality in Haparanda Municipality, in Norrbotten County, Sweden. Seskarö lies at 3 m above sea level. It has 386 inhabitants (2023). The nearest city is Luleå, 75 km to the west. Near the border: Finland, 19 km. Beaches nearby: Tromsö (2.6 km). Among the landmarks around are Alatornio Church (22 km), Seskarö Church (0.2 km) and Tornio Church (22 km).