Ostrów Wielkopolski County () 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.
Ostrów Wielkopolski County () is a local administrative division in Poland that came into existence in 1999 due to changes in the country's local government system.