Gruszków [ˈɡruʂkuf] is a village in the administrative district of Gmina Doruchów, within Ostrzeszów County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 3 kilometres (2 mi) east of Doruchów, 9 km (6 mi) east of Ostrzeszów, and 137 km (85 mi) south-east of the regional capital Poznań.