Cerkiewnik [t͡sɛrˈkʲɛvnik] is a village in the administrative district of Gmina Dobre Miasto, within Olsztyn County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 8 kilometres (5 mi) south of Dobre Miasto and 17 km (11 mi) north-west of the regional capital Olsztyn.