The Westerbach is a right tributary of the Kahl in the northern Spessart in Lower Franconia, Bavaria, Germany.

[citation needed] It is 6.3 km (3.9 mi) long (7.2 km including Querbach) and begins at the confluence of Querbach and Huckelheimer Bach in Westerngrund.

The Querbach rises in the Arzborn, a small opening in the mountainside on the Hoher Querberg, northeast of Huckelheim, near the border between Hesse and Bavaria.

[citation needed] Together with Sommerkahl, Reichenbach and Geiselbach, the Westernbach is one of the largest tributaries of the Kahl.

This article related to a river in Bavaria is a stub.