The Kraichbach is a 60 km long right tributary of the Rhine River running through the German state of Baden-Württemberg. The river source is in the Kraichgau region near the municipality of Sternenfels. It then flows to the northwest through Kürnbach, Oberderdingen, Kraichtal, Ubstadt-Weiher, Bad Schönborn and Kronau, all in the district of Karlsruhe. It then enters the district of Rhein-Neckar-Kreis and flows through Sankt Leon-Rot, Reilingen, Hockenheim and Ketsch before joining the Rhine.
Notable locations near the river include Gochsheim Castle, Schloss Kislau prison, and the Hockenheimring racing circuit.