Waldshut-Tiengen, frequently referred to as Waldshut, is a city located in the southwestern region of Baden-Württemberg, Germany. It is situated directly on the border with Switzerland.
The city serves as the district seat and is the largest municipality within the Waldshut district. According to Walter Christaller's Central Place Theory, it functions as a "middle centre" for the surrounding area, providing services to many towns and communities in the district that fall between the larger "high centres" of Lörrach and Weil am Rhein.
Due to its geographical position, the city experiences significant cross-border traffic involving the Swiss cantons of Aargau, Schaffhausen, and Zürich. This classification as a middle centre is based on economic geography rather than an official administrative scheme.