Rychnowo [rɨxˈnɔvɔ] is a village in the administrative district of Gmina Grunwald, within Ostróda County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 15 kilometres (9 mi) south-east of Ostróda and 35 km (22 mi) south-west of the regional capital Olsztyn.