As of the December 2023 timetable change,[update] the following services stop at Romanshorn:[2] After two years of planning, the station was opened in 1855, together with the first stage of the Winterthur–Romanshorn railway, of which it was a terminus.

[3] In 1869, the Swiss Northeastern Railway (German: Schweizerische Nordostbahn) put into service the Seelinie between Romanshorn and Rorschach.

In the same year, the Lake Constance train ferry was established, for cross-border goods traffic to and from Germany between Romanshorn and Friedrichshafen, and between Lindau and Bregenz.

[5] The train ferry to Lindau and Bregenz was suspended with the outbreak of World War II, and the link with Friedrichshafen was discontinued in 1976, after 107 years of operation.

Also, the public facilities were outdated, and access to tracks 5 and 6 was via a level crossing, which was secured by the legendary "Chetteli", i.e. chains and a roller shutter.

National publicity for the renovations was ensured by the sculpture of the mythical creature "mocmoc", a creation of the artist duo Com&Com.

As part of Rail 2000, an InterCity service, operating to an hourly clock-face timetable using IC2000 trains, was established between Romanshorn and Brig.