| Sandom Branch | |
| Name Other: | Tributary to Blackbird Creek |
| Map Size: | 180 |
| Pushpin Map: | USA Delaware#USA |
| Pushpin Map Size: | 180 |
| Pushpin Map Caption: | Location of Sandom Branch mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Delaware |
| Subdivision Type3: | County |
| Subdivision Name3: | New Castle |
| Length: | 2.33miles[1] |
| Discharge1 Location: | Blackbird Creek |
| Discharge1 Avg: | 3.28cuft/s at mouth with Blackbird Creek[2] |
| Source1: | divide between Sandom Branch and Duck Creek |
| Source1 Location: | about 2 miles south of Blackbird, Delaware[3] |
| Source1 Coordinates: | 39.3436°N -75.6728°W[4] |
| Source1 Elevation: | 50feet |
| Mouth: | Blackbird Creek |
| Mouth Location: | Blackbird, Delaware |
| Mouth Coordinates: | 39.3742°N -75.6528°W |
| Mouth Elevation: | 0feet |
| Progression: | Blackbird Creek → Delaware Bay → Atlantic Ocean |
| River System: | Blackbird Creek |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | unnamed tributaries |
Sandom Branch is a 2.33miles long tributary to Blackbird Creek in New Castle County, Delaware. Sandom Branch is one of the major tributaries to Blackbird Creek above tidal influence.
Sandom Branch rises on the Duck Creek divide about 2 miles south of Blackbird, Delaware.[3]
Sandom Branch drains of area, receives about 43.8 in/year of precipitation, has a topographic wetness index of 556.57 and is about 22.6% forested.[1]