Sławno County (Polish: powiat sławieński) is a unit of territorial administration and local government (powiat) in West Pomeranian Voivodeship, north-western Poland, on the Baltic coast.

It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998.

Its administrative seat is the town of Sławno, which lies 174 kilometres (108 mi) north-east of the regional capital Szczecin.

The only other town in the county is Darłowo, lying on the coast 19 km (12 mi) west of Sławno.

The county covers an area of 1,043.62 square kilometres (402.9 sq mi).