Round Pole Branch is a long first-order tributary to the Broadkill River in Sussex County, Delaware. This is the only stream of this name in the United States.
Round Pole Branch rises on the Sockorockets Ditch divide at Gravel Hill, Delaware and then flows generally north-northeast to join the Broadkill River at Milton, Delaware.
Round Pole Branch drains of area, receives about 45.1 in/year of precipitation, and is about 24.30% forested.