The St. Gallen S-Bahn () is an S-Bahn-style commuter rail in Eastern Switzerland and neighbouring areas. The network connects stations in the Swiss cantons of Appenzell Ausserrhoden, Appenzell Innerrhoden, Glarus, Grisons, Schaffhausen, St. Gallen, Thurgau and Zurich, as well as a few stations in Austria (Bregenz, Vorarlberg) and Germany (Konstanz, Baden-Württemberg and Lindau, Bavaria). Some services also operate as part of the Bodensee S-Bahn.
Services are operated by Appenzeller Bahnen (AB), Südostbahn (SOB), and Thurbo. Within Switzerland and until , services operate within the (Ostwind fare network) of northeastern Switzerland and Liechtenstein.
, the network consists of 22 lines, numbered 1âÂÂ2, 4âÂÂ7, 9âÂÂ10, 12, 14âÂÂ15, 17, 20âÂÂ26, 44 and 81âÂÂ82, using the "S" prefix typical for most S-Bahn systems. Only lines S1, S2, S4, S5, S20, S21, S22, S81 and S82 pass through or terminate in St. Gallen.
Unless stated otherwise, the lines are adhesion railways.
The following S-Bahn services operating within the Ostwind transit district and connecting with services of St. Gallen S-Bahn are not part of the latter:
A RegioExpress (RE) between Herisau and Konstanz (Germany), nicknamed der Konstanzer, supports the S-Bahn network. The S-Bahn network is further complemented by InterRegio (IR) services, such as the IR Voralpen-Express (operated by Südostbahn between St. Gallen and ) and IR 13 of Swiss Federal Railways (âÂÂâÂÂSt. GallenâÂÂâÂÂ), which stop at all major stations.
During weekends, in the night from Friday to Saturday and from Saturday to Sunday, there are nighttime S-Bahn services (designated SN followed by the route number). the following night routes existed: