From the Wikipedia page 
Pleszew County (Polish: powiat pleszewski) is a unit of territorial administration and local government (powiat) in Greater Poland Voivodeship, west-central Poland. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and only town is Pleszew, which lies 83 kilometres (52 mi) south-east of the regional capital Poznań.
Pleszew County is bordered by Września County and Słupca County to the north, Konin County to the north-east, the city of Kalisz and Kalisz County to the south-east, Ostrów Wielkopolski County to the south, Krotoszyn County to the south-west, and Jarocin County to the west.