Frygnowo [frɨɡˈnɔvɔ] is a village in the administrative district of Gmina Grunwald, within Ostróda County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 22 kilometres (14 mi) south of Ostróda and 41 km (25 mi) south-west of the regional capital Olsztyn.

In 1914 the fields around the village were the main battlefield of the Battle of Tannenberg, which was eventually named after the nearby village of Tannenberg (Stębark), whence the final victory note was dispatched by the German commanders.

• Reinhard Kollak (1915–1980), Luftwaffe pilot