Prosno [ˈprɔsnɔ] is a village in the administrative district of Gmina Chodecz, within Włocławek County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 6 kilometres (4 mi) south-east of Chodecz, 30 km (19 mi) south of Włocławek, and 80 km (50 mi) south-east of Toruń.