Stallion Head Branch is a long 1st tributary to Gum Branch in Sussex County, Delaware. This is the only stream of this name in the United States.
Stallion Head Branch rises about 1.5 miles southeast of Staytonville, Delaware and then flows south to join Gum Branch about 0.75 miles southwest of Oakley, Delaware.
Stallion Head Branch drains of area, receives about 45.4 in/year of precipitation, has a topographic wetness index of 757.38 and is about 4% forested.