Dmosin [ˈdmɔɕin] is a village in Brzeziny County, Łódź Voivodeship, in central Poland. It is the seat of the gmina (administrative district) 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 ("first Dmosin") and Dmosin Drugi ("second Dmosin").
The village has an approximate population of 1,500.