Kosakowo [kɔsaˈkɔvɔ] is a village in the administrative district of Gmina Srokowo, within Kętrzyn County, Warmian-Masurian Voivodeship, in northern Poland, close to the border with the Kaliningrad Oblast of Russia. It lies approximately 4 kilometres (2 mi) north-west of Srokowo, 18 km (11 mi) north of Kętrzyn, and 81 km (50 mi) north-east of the regional capital Olsztyn.