Grzybowo [ɡʐɨˈbɔvɔ] is a village in the administrative district of Gmina Regimin, within Ciechanów County, Masovian Voivodeship, in east-central Poland. It lies approximately 2 kilometres (1 mi) south of Regimin, 8 km (5 mi) north-west of Ciechanów, and 84 km (52 mi) north of Warsaw.