Jarosławiec is a village in the administrative district of Gmina Postomino, within Sławno County, West Pomeranian Voivodeship, in north-western Poland. It lies approximately 13 kilometres north-west of Postomino, 22 km north-west of Sławno, and 180 km north-east of the regional capital Szczecin. It is located on the Slovincian Coast in the historic region of Pomerania. The village has a population of 329.