Kiełbzak [ˈkʲɛu̯bzak] is a village in the administrative district of Gmina Zbójno, within Golub-Dobrzyń County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies 3 kilometres (2 mi) south-east of Zbójno, 15 km (9 mi) south-east of Golub-Dobrzyń, and 38 km (24 mi) east of Toruń.