 Wolsztyn County is bordered by Nowy Tomyśl County to the north, Grodzisk Wielkopolski County to the north-east, Kościan County to the east, Leszno County to the south-east, Wschowa County to the south, Nowa Sól County to the south-west and Zielona Góra County to the west.The county is subdivided into three gminas (one urban-rural and two rural).These are listed in the following table, in descending order of population.