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Jungfraujoch (el. 3471 m.) is a col or saddle between the Mönch and the Jungfrau in the Bernese Alps on the boundary between the cantons of Bern and Valais.
Strictly, the Jungfraujoch is the lowest point on the mountain ridge between Mönch and Jungfrau, at 3471 m. It is just above this location that the mountain station of Jungfraubahn is located, which at an elevation of 3,454 metres is the highest railway station in Europe. The Jungfraujoch is often called the "Top of Europe" in tourist literature.
The Jungfraujoch is also home to one of the Global Atmosphere Watch's atmospheric research stations. The Jungfraujoch can only be accessed through a 7.3 km long cog railway tunnel, served by the Jungfraubahn, the highest in a series of cooperating railway companies that provide access to the Jungfraujoch from Interlaken.