Gałczyn [ˈɡau̯t͡ʂɨn] is a village in the administrative district of Gmina Glinojeck, within Ciechanów County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) south-west of Glinojeck, 29 km (18 mi) west of Ciechanów, and 83 km (52 mi) north-west of Warsaw.