Wieluń County (Polish: powiat wieluński) 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 only town is Wieluń, which lies 88 kilometres (55 mi) south-west of the regional capital Łódź.
The county covers an area of 927.69 square kilometres (358.2 sq mi). As of 2006 its total population is 78,260, out of which the population of Wieluń is 24,347 and the rural population is 53,913.
