Which German exclave is completely surrounded by Switzerland?

Büsingen am Hochrhein is the German exclave completely surrounded by Switzerland.

The municipality lies in Baden-Württemberg’s Konstanz district, on the northern bank of the Rhine near Schaffhausen. Although it is politically German, Swiss territory separates it from the rest of Germany, making it both a German exclave and an enclave within Switzerland.

Büsingen’s unusual position affects daily life. Under a treaty that took effect in 1967, it became part of the Swiss customs territory, and Swiss systems influence commerce, postal arrangements, and everyday currency use. German sovereignty, however, remains intact, so it is not a Swiss municipality.

The village nearly changed countries: in a 1918 referendum, about 96% of voters favored joining Switzerland. No transfer followed because the two countries could not agree on suitable territory to exchange. Konstanz is nearby but is not an exclave, and Campione d’Italia is the comparable Italian enclave in Switzerland.