Czestków B is a village in the administrative district of Gmina Buczek, within Łask County, Łódź Voivodeship, in central Poland. It lies approximately 6 kilometres (4 mi) north-west of Buczek, 5 km (3 mi) south of Łask, and 36 km (22 mi) south-west of the regional capital Łódź.