Kapellskär is a port about 90 kilometres (60 mi) north of , in Sweden. It is located by the Baltic Sea, in Norrtälje Municipality, and is served by frequent passenger ferry services to Mariehamn, Åland, Finland, operated by Viking Line, with 3 services per day and direction during peak season. There are also services to Naantali in mainland Finland operated by Finnlink, and to Paldiski in Estonia operated by Tallink and DFDS, although only the Mariehamn route is open to pedestrians: the Naantali and DFDS Paldiski routes require a vehicle.
Coordinates: 59°43′17″N 019°03′53″E / 59.72139°N 19.06472°E