Ciężków [ˈt͡ɕɛ̃ʂkuf] is a village in the administrative district of Gmina Aleksandrów Łódzki, within Zgierz County, Łódź Voivodeship, in central Poland. It lies approximately 8 kilometres (5 mi) west of Aleksandrów Łódzki, 15 km (9 mi) west of Zgierz, and 20 km (12 mi) west of the regional capital Łódź.

In 2005 the village had a population of 120.