Sieroszewice ([ɕɛrɔʂɛˈvit͡sɛ]) is a village in Ostrów Wielkopolski County, Greater Poland Voivodeship, in west-central Poland. It is the seat of the gmina (administrative district) called Gmina Sieroszewice. It lies approximately 19 kilometres (12 mi) east of Ostrów Wielkopolski and 112 km (70 mi) south-east of the regional capital Poznań.