Sierosławiec [ɕɛrɔˈswavjɛt͡s] is a village in the administrative district of Gmina Krzęcin, within Choszczno County, West Pomeranian Voivodeship, in north-western Poland. It lies approximately 4 kilometres (2 mi) south of Krzęcin, 14 km (9 mi) south-east of Choszczno, and 73 km (45 mi) south-east of the regional capital Szczecin.

For the history of the region, see History of Pomerania.