Olszak

Olszak may refer to:

Places

 * Olszak, Greater Poland Voivodeship (west-central Poland)
 * Olszak, Masovian Voivodeship (east-central Poland)
 * Olszak, West Pomeranian Voivodeship (north-west Poland)

People with the surname

 * Grzegorz Olszak (1969–), Polish diplomat
 * Wacław Olszak (1868–1939), Polish physician and politician