Krosno [ˈkrɔsnɔ] (in full The Royal Free City of Krosno, Polish:Królewskie Wolne Miasto Krosno) is a town and county in Subcarpathian Voivodeship, Poland with 47,140 inhabitants, as of 30 June 2014.

Krosno is a medieval fortified town, a former Royal Free Town, a centre of cloth, linen, canvas, baize and Hungarian wine trade. Until recently it was a provincial capital. Today it is a medium-sized town with a population of fifty thousand, ranking sixth among Polish towns with the best living conditions. This evident success appears understandable when one looks at the history of the town.