Zielińsk [ˈʑɛliɲsk] is a village in the administrative district of Gmina Osięciny, within Radziejów County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 3 kilometres (2 mi) north-west of Osięciny, 13 km (8 mi) east of Radziejów, and 43 km (27 mi) south of Toruń.