Rheinfelden station is a station of the Swiss Federal Railways in Rheinfelden in the canton of Aargau. It was opened in 1875 and is located on the Bözberg route (Basel-Brugg-Zurich).
Rheinfelden was already connected to the railway network on February 4, 1856, but on the German side: At that time, the first section of the High Rhine Railway between Basel Badischer Bahnhof and Bad Säckingen was opened. In order to develop the up-and-coming health resort of Rheinfelden, the Grand Duchy of Baden State Railways put the station near Rheinfelden into operation near the northern bridgehead of the Old Rhine Bridge. The site was almost uninhabited at the time, and the town of Rheinfelden (Baden) only came into being four decades later. Since there was still no rail connection on the Swiss side, a committee was formed in 1869 to build the Bözberg line from Basel to Brugg; the city subscribed to bonds in the amount of 500,000 francs. Construction work began in 1871 as a joint project of the Swiss Central Railway and the Swiss Northeastern Railway. After four years of construction, the route and station were opened on August 2, 1875. The station set a new development focus southwest of the old town and promoted the development of local industry. The Salmenbräu and Feldschlösschen breweries received their own sidings in 1885 and 1889.