From the Wikipedia page 
Słupca County (Polish: powiat słupecki) 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 largest town is Słupca, which lies 66 kilometres (41 mi) east of the regional capital Poznań. The only other town in the county is Zagórów, lying 16 km (10 mi) south of Słupca.