Bytów County (, ) is a unit of territorial administration and local government (powiat) in Pomeranian Voivodeship, northern Poland. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and largest town is Bytów, which lies west of the regional capital Gdansk. The only other town in the county is Miastko, lying west of Bytów.