Immendingen station is a junction station in Immendingen in the German state of Baden-Württemberg. The Black Forest Railway from Offenburg to Konstanz connects with the Danube Valley Railway from Donaueschingen to Ulm meet at the station. Immendingen is also served by trains on the Wutach Valley Railway, which branches at the neighbouring Hintschingen station via Blumberg to Waldshut; regular passenger services have been restored on the section of the line to Blumberg since 2004 as part of the Ringzug concept. Until the construction of the Tuttlingen-Hattingen (Baden) connecting curve in 1934, Immendingen was also the terminus of trains from Stuttgart running over the Plochingen–Immendingen railway and Stuttgart–Horb railway (Gäubahn).

The Baden Black Forest Railway is a twin-track, electrified railway line in Baden-Württemberg, Germany, running in a NW-SE direction to link Offenburg on the Rhine Valley Railway (Rheintalbahn) with Singen on the High Rhine Railway (Hochrheinbahn). Passing directly across the Black Forest, through spectacular scenery, the route is 150 km long, ascends 650 metres from lowest to highest elevation, and passes through 39 tunnels and over 2 viaducts. It is still the only true mountain railway in Germany to be built with two tracks, and is the most important railway line in the Black Forest. It was built between 1863 and 1873, utilizing plans drawn up by Robert Gerwig.