The Rhine forms much of Liechtenstein’s western border.
The Rhine runs along Liechtenstein’s entire western boundary, separating the principality from Switzerland. In Liechtenstein, the river flows along the Upper Rhine Valley, creating a natural border that is central to the country’s geography and settlement pattern.
Liechtenstein is squeezed between Switzerland to the west and Austria to the east. Most of its population and major towns lie in the Rhine Valley, while the eastern side rises into the Rhaetikon Alps. The country extends for about 24 kilometres from north to south, and the Rhine section along its border is approximately 27 kilometres long.
The Rhine is not Liechtenstein’s only important river. The Samina is the principality’s second-longest river, flowing from the Alpine interior toward Austria. The Inn and Aare belong to other parts of the wider Alpine and Rhine drainage systems, while the Danube is a much larger river farther east.