Rybno [ˈrɨbnɔ] is a village in Działdowo County, Warmian-Masurian Voivodeship, in northern Poland. It is the seat of the gmina (administrative district) called Gmina Rybno. It lies approximately 24 kilometres (15 mi) north-west of Działdowo and 61 km (38 mi) south-west of the regional capital Olsztyn.