Ostaszewo may refer to the following places: Ostaszewo, Kuyavian-Pomeranian Voivodeship (north-central Poland) Ostaszewo, Masovian Voivodeship (east-central Poland) Ostaszewo, Pomeranian Voivodeship (north Poland) Ostaszewo, Warmian-Masurian Voivodeship (north Poland)