Sulin [ˈsulin] is a village in the administrative district of Gmina Kłecko, within Gniezno County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 7 kilometres (4 mi) south of Kłecko, 12 km (7 mi) west of Gniezno, and 41 km (25 mi) north-east of the regional capital Poznań.