Zaszków Kolonia [ˈzaʂkuf kɔˈlɔɲa] is a village in the administrative district of Gmina Nur, within Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It lies approximately 8 kilometres (5 mi) south-east of Nur, 40 km (25 mi) south-east of Ostrów Mazowiecka, and 107 km (66 mi) north-east of Warsaw.