Żeleźnia [ʐɛˈlɛʑɲa] is a village in the administrative district of Gmina Glinojeck, within Ciechanów County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 kilometres (2 mi) north-east of Glinojeck, 22 km (14 mi) west of Ciechanów, and 84 km (52 mi) north-west of Warsaw.