Olsza

Olsza may refer to the following places in Poland:


 * Olsza, Cracow, part of the Grzegórzki and Prądnik Czerwony districts of Kraków
 * Olsza, Lower Silesian Voivodeship (south-west Poland)
 * Olsza, Kuyavian-Pomeranian Voivodeship (north-central Poland)
 * Olsza, Podlaskie Voivodeship (north-east Poland)
 * Olsza, Łódź Voivodeship (central Poland)
 * Olsza, Greater Poland Voivodeship (west-central Poland)