Graham Branch is a long 2nd order tributary to Tubbs Branch in Sussex County, Delaware.
Graham Branch rises about 1 mile east of Pineridge, Delaware, and then flows north to join Tubbs Branch about 0.5 miles south of Concord.
Graham Branch drains of area, receives about 45.0 in/year of precipitation, has a wetness index of 641.33, and is about 6% forested.