| Blackett Creek | |
| Pushpin Map: | Canada Ontario |
| Pushpin Map Caption: | Location of the mouth of Blackett Creek in Ontario |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type4: | District |
| Subdivision Name4: | Thunder Bay |
| Length: | 8.5km (05.3miles) |
| Source1: | Blackett Lake |
| Source1 Coordinates: | 50.4594°N -88.7578°W |
| Source1 Elevation: | 325m (1,066feet) |
| Mouth: | Whitesand River |
| Mouth Coordinates: | 50.4097°N -88.8136°W |
| Mouth Elevation: | 313m (1,027feet) |
Blackett Creek is a river in Thunder Bay District, Ontario, Canada. It starts at Blackett Lake at an elevation of 325m (1,066feet) and travels 8.5km (05.3miles) to its mouth at the Whitesand River at an elevation of 313m (1,027feet).