Gernsbach is a town in the district of Rastatt, in Baden-Württemberg, Germany. It is located on the river Murg, 7 km (4.35 mi) east of Baden-Baden in the Black Forest. Twin towns are Baccarat in France and Pergola, Marche in Italy. The town is the historic centre of the lower Murg Valley and forms a central place of mid-size with Gaggenau. It is located in the Region Mittlerer Oberrhein, one of the twelve spatial planning regions of Baden-Württemberg. Gernsbach is an officially recognised climatic spa with a historic centre. Furthermore, Gernsbach is noted for its paper industry and Paper Centre, a service provider in the field of training, staff qualification and management consultancy for the German and Swiss paper and pulp industry.

The Black Forest is a large forested mountain range in the state of Baden-Württemberg in southwest Germany, bounded by the Rhine Valley to the west and south and close to the borders with France and Switzerland. It is the source of the Danube and Neckar rivers.