Wieluń is a town in south-central Poland with 21,624 inhabitants. The town is the seat of the Gmina Wieluń and Wieluń County, and is located within the Łódź Voivodeship. Wieluń is a capital of the historical Wieluń Land.
Wieluń has a long and rich history. In the past, it used to be an important urban trade centre of the Kingdom of Poland.