Brzeźno [ˈbʐɛʑnɔ] is a village in the administrative district of Gmina Goworowo, within Ostrołęka County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 kilometres (2 mi) north-east of Goworowo, 17 km (11 mi) south of Ostrołęka, and 88 km (55 mi) north-east of Warsaw.