Szubin ([ˈʂubin]) is a town in Nakło County, Kuyavian-Pomeranian Voivodeship, Poland, located southwest of Bydgoszcz.

After the successful Greater Poland uprising of 1806, it was regained by the Poles and included in the short-lived Polish Duchy of Warsaw, administratively located within its Bydgoszcz Department.

During the invasion of Poland, which started World War II, in September 1939, the town was quickly occupied by German troops and was directly annexed to Nazi Germany as part of the newly established region named Warthegau.

[7] In December 1939 and January 1940, the Germans expelled 1,280 and 780 Poles respectively, including activists, veterans of the Greater Poland Uprising, families of teachers, local officials and owners of shops, workshops and better houses, which were then handed over to German colonists as part of the Lebensraum policy.

[9] In 1940, the boys' school in the town was surrounded by barbed wire fences and additional concrete huts were added, so that it could become a prisoner-of-war camp for captured Polish, French, British, Canadian, Australian, New Zealand and Soviet officers as Oflag XXI-B, while the Stalag XXI-B POW camp was relocated to the nearby village of Tur.