Radomsko County (Polish: powiat radomszczański) is a unit of territorial administration and local government (powiat) in Łódź Voivodeship, central Poland.

It came into being on 1 January 1999 as a result of the Polish local government reforms passed in 1998.

Its administrative seat and largest town is Radomsko, which lies 80 kilometres (50 mi) south of the regional capital Łódź.

The county covers an area of 1,442.78 square kilometres (557.1 sq mi).

The county is subdivided into 14 gminas (one urban, two urban-rural and 11 rural).