Września County (Polish: powiat wrzesiński) 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 Września; the county is administered from the district office building there. The county covers an area of 704.19 square kilometres (271.9 sq mi). As of 2012 its total population is 76,453.