Oleśnica County (Polish: 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 1,049.7 square kilometres (405.3 sq mi). Its administrative seat is the town of Oleśnica, and it also contains the towns of Syców, Twardogóra, Bierutów and Międzybórz.