Troszczyn [ˈtrɔʂt͡ʂɨn] is a village in the administrative district of Gmina Opalenica, within Nowy Tomyśl County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 4 kilometres (2 mi) south-east of Opalenica, 21 km (13 mi) east of Nowy Tomyśl, and 36 km (22 mi) west of the regional capital Poznań.