Oleśnica County (powiat oleśnicki) is a unit of territorial administration and local government (powiat) in Lower Silesian Voivodeship, south-western Poland. It was created on January 1, 1999, as a result of the Polish local government reforms passed in 1998. The county covers an area of 1049.7 km2. Its administrative seat is the town of Oleśnica, and it also contains the towns of Syców, Twardogóra, Bierutów and Międzybórz.
As of 2019 the total population of the county is 107,090. The most populated towns are Oleśnica with 37,169 inhabitants and Syców is 10,397 inhabitants.
Oleśnica County is bordered by Milicz County and Ostrów Wielkopolski County to the north, Ostrzeszów County, Kępno County and Namysłów County to the east, Oława County to the south, and Wrocław County and Trzebnica County to the west.
