| Sullivan Branch | |
| Name Other: | Tributary to Marshyhope Creek |
| Map Size: | 250 |
| Pushpin Map: | Maryland#USA |
| Pushpin Map Size: | 250 |
| Pushpin Map Caption: | Location of Sullivan Branch mouth |
| Pushpin Map Alt: | Map of Sullivan Branch mouth location |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Maryland |
| Subdivision Type3: | County |
| Subdivision Name3: | Caroline |
| Length: | 2.34miles[1] |
| Discharge1 Location: | Marshyhope Creek |
| Discharge1 Avg: | 8.19cuft/s at mouth with Marshyhope Creek[2] |
| Source1: | confluence of Wolfpit and Raccoon Branches |
| Source1 Location: | about 3 miles north of Federalsburg, Maryland |
| Source1 Coordinates: | 38.7543°N -75.7824°W[3] |
| Source1 Elevation: | 38feet |
| Mouth: | Marshyhope Creek |
| Mouth Location: | about 2.5 miles north-northeast of Federalsburg, Maryland |
| Mouth Coordinates: | 38.7793°N -75.7608°W |
| Mouth Elevation: | 6feet |
| Progression: | Marshyhope Creek → Nanticoke River → Chesapeake Bay → Atlantic Ocean |
| River System: | Nanticoke River |
| Tributaries Left: | Raccoon Branch |
| Tributaries Right: | Wolfpit Branch |
| Bridges: | Long Swamp Road, Smithville Road |
Sullivan Branch is a 2.34miles long second-order tributary to Marshyhope Creek in Caroline County, Maryland.
Sullivan Branch rises about north of Federalsburg, Maryland and then flows southeast to join Marshyhope Creek about north-northeast of Federalsburg, Maryland.[3]
Sullivan Branch drains of area, receives about 44.6 in/year of precipitation, and is about 12.53% forested.[2]