Wielkie Gacno (Polish pronunciation: [ˈvjɛlkʲɛ ˈɡat͡snɔ]) is a village in the administrative district of Gmina Cekcyn, within Tuchola County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 10 kilometres (6 mi) north-east of Cekcyn, 18 km (11 mi) east of Tuchola, and 58 km (36 mi) north of Bydgoszcz.