In geology, a graben is a depressed fault block bordered by normal faults. The Rhine valley below Basel, Switzerland is an example of a graben. "Graben" is the German word for "ditch".

See also rift (geology), and Horst.

There are municipalities and communities names that have the name Graben:

In Germany

• Graben bei Augsburg
• Graben bei Treuchtlingen

In Switzerland

• Graben, Switzerland , in the Canton of Bern

The Graben is one of the most important streets Vienna's first district, the center of the city. It takes its name from the wall of one of the moats of the Roman encampment of Vindobona which was located there in ancient times.