Schaffhausen, historically known in English as Shaffhouse, is a town with historic roots, a municipality in northern Switzerland, and the capital of the canton of the same name; it has an estimated population of 36,000 as of December 2016. It is located right next to the shore of the High Rhine; it is one of four Swiss towns located on the northern side of the Rhine, along with Neuhausen am Rheinfall, the historic Neunkirch, and medieval Stein am Rhein.

The canton of Schaffhausen, also canton of Schaffhouse, is the northernmost canton of Switzerland. The principal city and capital of the canton is Schaffhausen. The canton's territory is divided into three non-contiguous segments, where German territory reaches the Rhine. The large central part, which includes the capital, in turn separates the German exclave of Büsingen am Hochrhein from the rest of Germany.