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).

The county is subdivided into eight gminas (one urban, four urban-rural and three rural).

These are listed in the following table, in descending order of population.