The Turgi–Koblenz–Waldshut railway line is a railway line in Switzerland. It runs from Turgi in Switzerland via Koblenz to Waldshut in Germany. The Turgi–Koblenz–Waldshut line was the first rail link between Germany and Switzerland. It was opened on 18 August 1859 by the Swiss Northeastern Railway (German: Schweizerische Nordostbahn, NOB). It provides a connection from the Baden–Brugg line in Turgi to the High Rhine Railway in Waldshut.