Rheinfelden (Alemannic German: Badisch-Rhyfälde, pronounced [ˈb̥ad̥ɪʃ ʁifæld̥ə]) is a town in the district of Lörrach in Baden-Württemberg, Germany.

It is situated on the right bank of the Rhine, across from Rheinfelden, Switzerland, and 15 km east of Basel.

Rheinfelden is located on the Swiss-German border, between the High Rhine to the south and the Dinkelberg hills to the north in the district of Lörrach.

These are: Apart from the town core, the villages forming Rheinfelden date from the early Middle Ages.

Partly because of this, a teasing animosity exists between the villages with their longer history and traditions, and the industrial town core with its diverse population of recent origin.