Brończyn [ˈbrɔɲt͡ʂɨn] is a village in the administrative district of Gmina Błaszki, within Sieradz County, Łódź Voivodeship, in central Poland. It lies approximately 3 kilometres (2 mi) south-west of Błaszki, 25 km (16 mi) west of Sieradz, and 76 km (47 mi) west of the regional capital Łódź.