Świączyń (Polish pronunciation: [ˈɕfjɔnt͡ʂɨj̃]) is a village in the administrative district of Gmina Książ Wielkopolski, within Śrem County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 5 kilometres (3 mi) east of Książ Wielkopolski, 20 km (12 mi) east of Śrem, and 44 km (27 mi) south-east of the regional capital Poznań.