McColleys Branch is a 4.28 mi (6.89 km) long 2nd order tributary to Deep Creek in Sussex County, Delaware. This is the only stream of this name in the United States.[1]
According to the Geographic Names Information System, it has also been known historically as:[1]
McColleys Branch rises on the Horse Pound Swamp Ditch divide about 0.5 miles southwest of Bull Pine Corners, Delaware, and then flows northwesterly to join Deep Creek about 3 miles southeast of Coverdale Crossroads.[3]
McColleys Branch drains 11.84 square miles (30.7 km2) of area, receives about 45.2 in/year of precipitation, has a wetness index of 708.10, and is about 22% forested.[5]