Ettlingen is a town in Baden-Württemberg, Germany, about 8 kilometres (5 mi) south of the city of Karlsruhe and approximately 15 kilometres (9 mi) from the border with Lauterbourg, in France's Bas-Rhin department. Ettlingen is the second largest town in the district of Karlsruhe, after Bruchsal.

Rheinstetten is a town in the west of Baden-Württemberg on the border to Rhineland-Palatinate. It is situated to the south-west of Karlsruhe and belongs to the rural district of Karlsruhe. The city has fewer inhabitants than Bruchsal, Ettlingen, Bretten and Stutensee and is therefore the fifth largest city in the district of Karlsruhe. Since 2005 it has formed part of a regional organization for economy, science, culture and administration, the Technologieregion Karlsruhe.