Sulz is a river of Bavaria, Germany. It flows parallel to the Rhine–Main–Danube Canal for much of its length. It is a left tributary of the Altmühl in Beilngries.

The Sulz River is integral to the local ecosystem and supports various community activities. For instance, the Altmühl-Sulz-Energie GmbH utilizes regional resources to provide sustainable heating solutions to municipalities, businesses, and households in Beilngries and Berching.

• List of rivers of Bavaria