Olsztyn (disambiguation)

Olsztyn (formerly Allenstein) is a city in north-eastern Poland.

Olsztyn may also refer to:
 * Olsztyn Voivodeship, a former administrative unit in Poland
 * Olsztyn, Silesian Voivodeship, a village in south Poland with ruins of a 14th-century castle
 * SS Olsztyn, a Hansa A Type cargo ship in service 1947-72