Krosno County (Polish: powiat krośnieński) is a unit of territorial administration and local government (powiat) in Subcarpathian Voivodeship, south-eastern 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.

The county contains four towns: Jedlicze, Rymanów, Dukla, and Iwonicz-Zdrój.

The county covers an area of 923.79 square kilometres (356.7 sq mi).

The county is subdivided into ten gminas (four urban-rural and six rural).