Ostrowąż [ɔsˈtrɔvɔ̃ʂ] is a village in the administrative district of Gmina Ślesin, within Konin County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 8 kilometres (5 mi) north-west of Ślesin, 23 km (14 mi) north of Konin, and 90 km (56 mi) east of the regional capital Poznań.