Oleśnica is a town in Lower Silesian Voivodeship, in south-western Poland, within the Wrocław metropolitan area. It is the administrative seat of Oleśnica County and also of the rural district of Gmina Oleśnica, although it is not part of the territory of the latter, the town being an urban gmina in its own right.

Lower Silesian Voivodeship in southwestern Poland, is one of the 16 voivodeships (provinces) into which Poland is divided. The voivodeship was created on 1 January 1999 out of the former Wrocław, Legnica, Wałbrzych and Jelenia Góra Voivodeships, following the Polish local government reforms adopted in 1998. It covers an area of 19,946 square kilometres (7,701 sq mi), and as of 2019 has a total population of 2,899,986.