Marbach () is a small river of Hesse, Germany. It flows into the Mergbach in Gumpen.
The Marbach originates in the Vorderer Odenwald within a forested area west of the Stotz (478.1â¯m above sea level). It initially flows in a northwestward direction. In Reichelsheim-GroÃÂ-Gumpen, it passes beneath Federal Highways B47 and B38, locally known as KriemhildstraÃÂe, and a few meters further downstream it flows into the Mergbach.