Jarocin County (Polish: powiat jarociński) 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 Jarocin, which lies 63 kilometres (39 mi) south-east of the regional capital Poznań.

The only other town in the county is Żerków, lying 12 km (7 mi) north of Jarocin.

The county covers an area of 587.7 square kilometres (226.9 sq mi).