Oleszyce is a small town in Subcarpathian Voivodeship, Poland, with 3,089 inhabitants (02.06.2009).

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.