White Marsh Branch is a long 2nd order tributary to the Nanticoke River in Sussex County, Delaware.
White Marsh Branch rises at Farmington, Delaware in Kent County and then flows south into Sussex County to join the Nanticoke River about 0.5 miles northeast of Greenwood, Delaware.
White Marsh Branch drains of area, receives about 45.3 in/year of precipitation, has a topographic wetness index of 703.88 and is about 4% forested.