Koślinka [kɔˈɕlinka] is a village in the administrative district of Gmina Tuchola, within Tuchola County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 17 kilometres (11 mi) north-east of Tuchola and 68 km (42 mi) north of Bydgoszcz.