Mostówka [mɔsˈtufka] (German: Mostauken) is a village in the administrative district of Gmina Zabrodzie, within Wyszków County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) north-east of Zabrodzie, 9 km (6 mi) south of Wyszków, and 46 km (29 mi) north-east of Warsaw.