Karszewo [karˈʂɛvɔ] is a village in the administrative district of Gmina Korsze, within Kętrzyn County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 4 kilometres (2 mi) north of Korsze, 21 km (13 mi) north-west of Kętrzyn, and 63 km (39 mi) north-east of the regional capital Olsztyn.