Jasło County (Pol. powiat jasielski) is one of 21 land counties of Subcarpathian Voivodeship, Poland. The county covers an area of 831.1 km², its total population is 115,000 people, the population density is 139.3 p/km². The county's administrative centre is Jasło. Jasło County came into being on January 1, 1999 as a result of an administrative reform.
A significant part of the mountain massif Low Beskids is situated on the territory of Jasło County. This is the lowest mountain range of the Polish Carpathian Mountains with the highest peak of 997 m (Lackowa). A characteristic feature of Low Beskids is lengthened ridges with flat meadows and dome-shaped tops. Magura National Park is located here, covering an area of 19,000 km². The protected area includes a vast range of Magura Wątkowska, Stone massif and adjacent to it ridge from the springs of Wisłoka to the top of Baranja. The fragments of the Carpathian Forest with old beech and fir trees, large birds of prey and mammals are protected on the area of Magura National Park. Over 200 fauna species are widely-distributed here, among them under special protection is the Lesser Spotted Eagle, which has become a symbol of the National Park. In addition the Kornuty reserve and geological sight Diabli Kamień (Devil’s Stone) are located here. The Natural History Museum functions in the village of Krempna as based on the Magura National Park.
Low Beskids is a great place for horse riding and cycling. Numerous picturesque tourist routes are marked here. Traditional Lemko horse raids and driving of big herds of cattle with the possibility to catch them on the lasso, riding around young stallions are popular in this locality. Jasło County is known in Subcarpathian by multiple wooden churches. The oldest of them are St. Dorothy Catholic church in Trzcinica and church of the Transfiguration in Osiek Jasielski.