Zielonka [ʑɛˈlɔŋka] is a village in the administrative district of Gmina Tuchola, within Tuchola County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 9 kilometres (6 mi) north-east of Tuchola and 61 km (38 mi) north of Bydgoszcz.