Więcbork ([ˈvjɛnd͡zbɔrk]; German: Vandsburg) is a town in northern Poland, located in the Sępólno County in the Kuyavian-Pomeranian Voivodeship.

[2] Administratively it was located in the Nakło County in the Kalisz Voivodeship in the Greater Poland Province.

After the successful Greater Poland uprising of 1806, it was regained by Poles and included within the short-lived Duchy of Warsaw.

Following World War I, Poland regained independence and the town was eventually reintegrated with the re-established Polish Republic after the Treaty of Versailles in 1920.

During the joint German-Soviet invasion of Poland, which started World War II in September 1939, Więcbork was invaded by Nazi Germany.