Tull Branch is a long second-order tributary to Marshyhope Creek in Caroline County, Maryland. This is the only stream of this name in the United States.
Tull Branch rises about north-northwest of Federalsburg, Maryland and then flows southeast to join Marshyhope Creek about north of Federalsburg, Maryland.
Tull Branch drains of area, receives about 44.5 in/year of precipitation, and is about 10.31% forested.