| Black Duck River | |
| Map Size: | 285 |
| Pushpin Map: | Canada Newfoundland and Labrador |
| Pushpin Map Size: | 285 |
| Pushpin Map Caption: | Location of the mouth of the Black Duck River in Newfoundland and Labrador |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Newfoundland and Labrador |
| Subdivision Type4: | District |
| Subdivision Name4: | St. Mary's Bay |
| Source1: | Marsh |
| Source1 Coordinates: | 47.2311°N -53.5453°W |
| Source1 Elevation: | 48m (157feet) |
| Mouth: | Rocky River |
| Mouth Coordinates: | 47.2247°N -53.5656°W |
| Mouth Elevation: | 2m (07feet) |
| River System: | Atlantic Ocean drainage basin |
The Black Duck River is a short river in St. Mary's Bay, on the Avalon Peninsula, Newfoundland and Labrador, Canada.[1] It flows from its source through the Black Duck Ponds to its mouth at the Rocky River, near the community of Colinet, just upstream of that river's mouth at St. Mary's Bay on the Atlantic Ocean.