Brzesko County (Polish: powiat brzeski) is a unit of territorial administration and local government (powiat) in Lesser Poland Voivodeship, southern 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 Brzesko, which lies 50 kilometres (31 mi) east of the regional capital Kraków.

The only other town in the county is Czchów, lying 14 km (9 mi) south of Brzesko.

The county covers an area of 590 square kilometres (227.8 sq mi).