| Alapocas Run | |
| Name Other: | Tributary to Brandywine Creek |
| Map Size: | 180 |
| Pushpin Map: | Delaware#USA |
| Pushpin Map Size: | 180 |
| Pushpin Map Caption: | Location of Alapocas Run mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Delaware |
| Subdivision Type3: | County |
| Subdivision Name3: | New Castle |
| Subdivision Type4: | City |
| Subdivision Name4: | Wilmington, Delaware |
| Length: | 1.05miles[1] |
| Discharge1 Location: | Brandywine Creek |
| Discharge1 Avg: | 1.27cuft/s at mouth with Brandywine Creek[2] |
| Source1: | divide between Brandywine Creek and Shellpot Creek |
| Source1 Location: | Blue Ball, Delaware[3] |
| Source1 Coordinates: | 39.7806°N -75.5467°W[4] |
| Source1 Elevation: | 320feet |
| Mouth: | Brandywine Creek |
| Mouth Location: | Wilmington, Delaware[5] |
| Mouth Coordinates: | 39.7686°N -75.5589°W |
| Mouth Elevation: | 40feet |
| Progression: | southwest |
| River System: | Christina River |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | unnamed tributaries |
Alapocas Run is a 1.05miles long tributary to Brandywine Creek in New Castle County, Delaware. This run drains a large portion of Alapocas Run State Park in the Wilmington, Delaware area.