Karczewiec [karˈt͡ʂɛvjɛt͡s] is a village in the administrative district of Gmina Sorkwity, within Mrągowo County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 9 kilometres (6 mi) south of Sorkwity, 16 km (10 mi) south-west of Mrągowo, and 43 km (27 mi) east of the regional capital Olsztyn.