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Büsingen am Hochrhein (German: [ˈbyːzɪŋən ʔam ˈhoːxʁaɪn], lit. 'Büsingen on the High Rhine'; Alemannic: Büesinge am Hochrhi, pronounced [ˈbyəzɪŋə am ˈhoːçri]), often known simply as Büsingen, is a German municipality (7.62 km [2.94 sq mi]) in the south of Baden-Württemberg with a population of about 1,548 inhabitants. It is an exclave of Germany and Baden-Württemberg, and an enclave of Switzerland, entirely surrounded by the Swiss cantons of Schaffhausen, Zürich, and Thurgau. It is separated from the rest of Germany by a narrow strip of land (at its narrowest, about 680 m [2,230 ft] wide) containing the Swiss village of Dörflingen. Büsingen is approximately 5 km (3.1 mi) from the town of Schaffhausen and 3 km (1.9 mi) from Dörflingen, the nearest village. Its status as an exclave dates to before the formation of the modern German and Swiss states, having previously been a detached part of Further Austria, the Kingdom of Württemberg and the Grand Duchy of Baden.
Politically, Büsingen is part of Germany, forming part of the district of Konstanz, but, economically, it forms part of the Swiss customs union, along with the principality of Liechtenstein and up until 2019, albeit unofficially, the Italian village of Campione d'Italia. As such, there have been no border controls between Switzerland and Büsingen since 4 October 1967.