Karlsruhe Karlsruhe is a city in Germany, in Baden-Württemberg, located in the vicinity of the Rhine River near the French-German border. Karlsruhe is the second most populous city in Baden-Württemberg and the 21st in Germany. IKEA Karlsruhe 0.0 /5 rating (0 votes) Durlacher Allee 97 76137 Karlsruhe Details