Wieluń is a town in south-central Poland with 21,624 inhabitants (2021). 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.

Łódź Voivodeship is a voivodeship (province) of Poland. It was created on 1 January 1999 out of the former Łódź Voivodeship (1975–1999) and the Sieradz, Piotrków Trybunalski and Skierniewice Voivodeships and part of Płock Voivodeship, pursuant to the Polish local government reforms adopted in 1998. The province is named after its capital and largest city, Łódź, pronounced.