Czarmuń (pronounced [ˈt͡ʂarmuɲ]) is a village in the administrative district of Gmina Więcbork, within Sępólno County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 7 kilometres (4 mi) south-west of Więcbork, 18 km (11 mi) south of Sępólno Krajeńskie, and 42 km (26 mi) north-west of Bydgoszcz.