Grójec Wielki (Polish pronunciation: [ˈɡrujɛts ˈfjɛlkʲi]) is a village in the administrative district of Gmina Siedlec, within Wolsztyn County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 10 kilometres (6 mi) north-west of Siedlec, 17 km (11 mi) north-west of Wolsztyn, and 74 km (46 mi) west of the regional capital Poznań.