Ostrowo may refer to the following places in Poland:
In Pomeranian Voivodeship (north Poland):
- Ostrowo, a seaside resort, part of the town of Władysławowo
- Ostrowo, Bytów County
- Ostrowo, Kartuzy County
In Kuyavian-Pomeranian Voivodeship (north-central Poland):
- Ostrowo, Gmina Gniewkowo
- Ostrowo, Mogilno County
- Ostrowo, Nakło County
- Ostrowo, Tuchola County
- Ostrowo, Wąbrzeźno County
In Greater Poland Voivodeship (west-central Poland):
- Ostrowo, Gostyń County
- Ostrowo, Konin County
- Ostrowo, Słupca County
- Ostrowo, Śrem County
Elsewhere:
- Ostrowo, Podlaskie Voivodeship (north-east Poland)