| Gum Branch | |
| Name Other: | Tributary to Nanticoke River |
| Map Size: | 180 |
| Pushpin Map: | Delaware#USA |
| Pushpin Map Size: | 180 |
| Pushpin Map Caption: | Location of Gum Branch mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Delaware |
| Subdivision Type3: | County |
| Subdivision Name3: | Sussex |
| Length: | 9.72miles[1] |
| Discharge1 Location: | Nanticoke River |
| Discharge1 Avg: | 37.35cuft/s at mouth with Nanticoke River[2] |
| Source1: | divide between Gum Branch and Johnson Branch (Mispillion River) |
| Source1 Location: | about 3 miles northwest of Ellendale, Delaware[3] |
| Source1 Coordinates: | 38.8344°N -75.4856°W[4] |
| Source1 Elevation: | 55feet |
| Mouth: | Nanticoke River |
| Mouth Location: | about 1 mile northwest of Coverdale Crossroads, Delaware |
| Mouth Coordinates: | 38.73°N -75.5611°W |
| Mouth Elevation: | 20feet |
| Progression: | Nanticoke River → Chesapeake Bay → Atlantic Ocean |
| River System: | Nanticoke River |
| Tributaries Left: | Parker Branch Gully Camp Ditch |
| Tributaries Right: | Stallion Head Branch West Branch Gum Branch Toms Dam Branch |
Gum Branch is a 9.72miles long tributary to Nanticoke River in Sussex County, Delaware. It is one of the major tributaries to the Nanticoke River in Delaware along with Deep Creek, Gravelly Branch, and Broad Creek.