Gronowo [ɡrɔˈnɔvɔ] is a village in the administrative district of Gmina Rybno, within Działdowo County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 3 kilometres (2 mi) north-west of Rybno, 26 km (16 mi) north-west of Działdowo, and 61 km (38 mi) south-west of the regional capital Olsztyn.