Mianowo [mjaˈnɔvɔ] is a village in the administrative district of Gmina Andrzejewo, within Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) south of Andrzejewo, 21 km (13 mi) east of Ostrów Mazowiecka, and 104 km (65 mi) north-east of Warsaw.