Kętrzyn [ˈkɛntʂɨn] (German: Rastenburg, from Lithuanian and Old Prussian Raistpilis — "a castle in the swamps") ( listen); 1945-1946 Polish: Rastembork), is a town in northeastern Poland with 28,351 inhabitants (2004). Situated in the Warmian-Masurian Voivodeship (since 1999), Kętrzyn was previously in Olsztyn Voivodeship (1975–1998). It is the capital of Kętrzyn County.