Ostrowo [ɔsˈtrɔvɔ] is a village in the administrative district of Gmina Powidz, within Słupca County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 4 kilometres (2 mi) north-east of Powidz, 18 km (11 mi) north of Słupca, and 72 km (45 mi) east of the regional capital Poznań.