Warszew [ˈvarʂɛf] is a village in the administrative district of Gmina Opatówek, within Kalisz County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 4 kilometres (2 mi) north-east of Opatówek, 15 km (9 mi) east of Kalisz, and 119 km (74 mi) south-east of the regional capital Poznań.