Jasło County 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. Its administrative seat is Jasło, which lies 50 kilometres (31 mi) south-west of the regional capital Rzeszów. The only other town in the county is Kołaczyce, which is 8 km (5.0 mi) north of Jasło.