Mulberry Fork is a tributary of the Black Warrior River, 102 miles (164 km) long, in the U.S. state of Alabama.

It drains part of the southernmost end of the Appalachian Mountains north and west of Birmingham in the drainage basin of the Mobile River.

It flows in tight meanders along a ridge of the foothills, forming the boundary between Cullman and Blount counties.

It receives the Sipsey Fork from the northwest approximately 15 mi (24 km) east of Jasper.

The confluence with the Locust Fork is now submerged within Bankhead Lake, approximately 25 mi (40 km) west of Birmingham.