Konstantynów Łódzki is a town in Pabianice County, Łódź Voivodeship, Poland, with 17,569 inhabitants (2004). It was incorporated in 1924, but originally founded in the 1820s by a landowner who had planned to build a textile industry there. In 1821 Konstantynów Łódzki ,at that time still a village, officially became a part of the textile industry of the Łódz region. Shortly thereafter, in 1824 the town has been given its current name and has been established as a town in 1830.