Singen (Hohentwiel) station is an important regional railway junction and interchange station in the town of Singen in the south of the German state of Baden-Württemberg. Three railways now meet there, but in the past five railways connected to it. The station is served by InterCity trains on the Stuttgart–Zurich route and it is the end of line S22 of the Zurich S-Bahn.
Singen is the starting point of the Gäu Railway (Gäubahn) to Stuttgart. On this line, the city is a stop for InterCity services between Stuttgart, Singen, Schaffhausen and Zurich. In addition, trains on the Black Forest Railway (Badische Schwarzwaldbahn), connecting Singen Offenburg and Konstanz stop in Singen. The Upper Rhine Railway (Hochrheinbahn) provides connections to Basel.