Oborniki County (Polish: powiat obornicki) is a unit of territorial administration and local government (powiat) in Greater Poland Voivodeship, west-central Poland. It was created on January 1, 1999 as a result of the Local Government Reorganization Act of 1998. Its administrative seat and largest town is Oborniki, which lies 29 kilometres (18 mi) north of the regional capital Poznań. The only other town in the county is Rogoźno, lying 17 km (11 mi) north-east of Oborniki.
The county covers an area of 712.65 square kilometres (275.2 sq mi). As of 2006 its total population is 55,976, out of which the population of Oborniki is 17,850, that of Rogoźno is 10,905, and the rural population is 27,221.
The county is subdivided into three gminas (two urban-rural and one rural). These are listed in the following table, in descending order of population.