Dmosin is a village in Brzeziny County, Łódź Voivodeship, in central Poland. It is the seat of the gmina called Gmina Dmosin. It lies approximately 14 kilometres (9 mi) north of Brzeziny and 26 km (16 mi) north-east of the regional capital Łódź. It consists of three sołectwos: Dmosin, Dmosin Pierwszy and Dmosin Drugi.