Koczek [ˈkɔt͡ʂɛk] (German: Waldersee) is a village in the administrative district of Gmina Świętajno, within Szczytno County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 14 kilometres (9 mi) north-east of Świętajno, 28 km (17 mi) east of Szczytno, and 61 km (38 mi) east of the regional capital Olsztyn.