Kosew [ˈkɔsɛf] is a village in the administrative district of Gmina Świnice Warckie, within Łęczyca, Łódź Voivodeship, in central Poland. It lies approximately 8 kilometres (5 mi) northeast of Świnice Warckie, 14 km (9 mi) west of Łęczyca, and 45 km (28 mi) northwest of the regional capital Łódź.