Kamionowo [kamjɔˈnɔvɔ] is a village in the administrative district of Gmina Troszyn, within Ostrołęka County, Masovian Voivodeship, in east-central Poland. It lies approximately 13 kilometres (8 mi) east of Troszyn, 24 km (15 mi) east of Ostrołęka, and 112 km (70 mi) north-east of Warsaw.