Basel Badischer Bahnhof is a railway station in the Swiss city of Basel 2 km south of the Germany–Switzerland border. Despite its location, its land is an enclave of the EU Customs Union of Germany, with German rules applying to its rail traffic and infrastructure, the latter owned and operated by the respective German entities so that, for example, the station's clocks bear the "DB" logo of Deutsche Bahn.

The Basel S-Bahn has provided an S-Bahn-style rail service connecting the Basel metropolitan area since 1997 in Switzerland, Germany and France. It consists of eight suburban train lines, including four that operate across borders.