Ostrowite [ɔstrɔˈvitɛ] is a village in the administrative district of Gmina Lniano, within Świecie County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 3 kilometres (2 mi) south-west of Lniano, 20 km (12 mi) north-west of Świecie, and 47 km (29 mi) north of Bydgoszcz.