Żywiec County (Polish: powiat żywiecki) is a unit of territorial administration and local government (powiat) in Silesian Voivodeship, southern Poland, on the Slovak border. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and only town is Żywiec, which lies 64 kilometres (40 mi) south of the regional capital Katowice.
The county covers an area of 1,039.96 square kilometres (401.5 sq mi). As of 2019 its total population is 152,877, out of which the population of Żywiec is 31,194 and the rural population is 121,683.