Wieluń is a town situated in south-central Poland. It serves as the administrative seat for both the Gmina Wieluń and the Wieluń County, located within the Łódź Voivodeship. As of 2021, the town has a population of 21,624 inhabitants.
The town holds historical significance as the capital of the historical Wieluń Land. It remains a primary administrative and geographical center for its surrounding region in the Polish interior.