Jasło [ˈjaswɔ] is a county town in south-eastern Poland with 36,641 inhabitants, as of 31 December 2012. It is situated in the Subcarpathian Voivodeship (since 1999); previously it was in 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.