Wieruszów is a town located in south-central Poland within the southwestern region of the Łódź Voivodeship. It serves as the administrative seat for both Wieruszów County and Gmina Wieruszów. As of 2020, the town has a population of 8,446 inhabitants.
Geographically, the town is situated along the Prosna river and lies within the historical region known as Wieluń Land.