Jasło is a county town in south-eastern Poland with 36,641 inhabitants, as of 31 December 2012. It is situated in the Subcarpathian Voivodeship, and it was previously part of Krosno Voivodeship (1975–1998). It is located in Lesser Poland, in the heartland of the Doły (Pits), and its average altitude is 320 metres above sea level, although there are some hills located within the confines of the city. The Patron Saint of the city is Saint Anthony of Padua.

Subcarpathian Voivodeship is a voivodeship, or province, in the southeastern corner of Poland. Its administrative capital and largest city is Rzeszów. Along with the Marshal, it is governed by the Subcarpathian Regional Assembly. Historically, most of the province's territory was part of the Kingdom of Galicia–Volhynia, the Kingdom of Galicia and Lodomeria and the Ruthenian Voivodeship. In the interwar period, it was part of the Lwów Voivodeship.