Tyndall Branch is a third-order tributary to Deep Creek, in Sussex County, Delaware.
According to the Geographic Names Information System, it has also been known historically as Stoney Branch.
Tyndall Branch is formed at the confluence of Stoney Branch and Asketum Branch about 0.5 miles north of Hardscrabble in Sussex County, Delaware. Tyndall Branch then flows south-southwest to meet Deep Creek about 0.5 miles south-southwest of Old Furnace.
Tyndall Branch drains of area, receives about 45.1 in/year of precipitation, has a topographic wetness index of 690.47 and is about 14.38% forested.