Czarnotrzew [t͡ʂarˈnɔtʂɛf] is a village in the administrative district of Gmina Baranowo, within Ostrołęka County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) east of Baranowo, 19 km (12 mi) north-west of Ostrołęka, and 111 km (69 mi) north of Warsaw.