Kopernica nad Jeziorem [kɔpɛrˈnit͡sa ˌnad jɛˈʑɔrɛm] is a settlement in the administrative district of Gmina Chojnice, within Chojnice County, Pomeranian Voivodeship, in northern Poland. It lies approximately 12 kilometres (7 mi) north of Chojnice and 99 km (62 mi) south-west of the regional capital Gdańsk.

For details of the history of the region, see History of Pomerania.