Osiek Wielki (Polish pronunciation: [ˈɔɕɛk ˈfjɛlkʲi]) is a village in the administrative district of Gmina Rojewo, within Inowrocław County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 9 kilometres (6 mi) north of Rojewo, 22 km (14 mi) north of Inowrocław, 24 km (15 mi) west of Toruń, and 25 km (16 mi) south-east of Bydgoszcz.