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)
This disambiguation page lists articles about distinct geographical locations with the same name.
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