Gmina Zadzim is a rural gmina (administrative district) in Poddębice County, Łódź Voivodeship, in central Poland. Its seat is the village of Zadzim, which lies approximately 16 kilometres (10 mi) south-west of Poddębice and 43 km (27 mi) west of the regional capital Łódź.
The gmina covers an area of 144.36 square kilometres (55.7 sq mi), and as of 2006 its total population is 5,341.