Piotrowo Wielkie [pjɔˈtrɔvɔ ˈvjɛlkʲɛ] is a village in the administrative district of Gmina Wielichowo, within Grodzisk Wielkopolski County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 4 kilometres (2 mi) west of Wielichowo, 14 km (9 mi) south of Grodzisk Wielkopolski, and 53 km (33 mi) south-west of the regional capital Poznań.