| Port Granby Creek | |
| Name Other: | French: ruisseau Port Granby |
| Name Etymology: | Named for Port Granby |
| Pushpin Map: | Canada Southern Ontario |
| Pushpin Map Caption: | Location of the mouth of Port Granby Creek in southern Ontario |
| Pushpin Map Alt: | Map of southern Ontario with a red dot at the mouth of Port Granby Creek |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type3: | Regional Municipality |
| Subdivision Name3: | Durham |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Clarington |
| Source1: | Confluence of two unnamed streams |
| Source1 Elevation: | 126[1] |
| Mouth: | Lake Ontario |
| Mouth Location: | Port Granby |
| Mouth Coordinates: | 43.9036°N -78.4592°W |
| Mouth Elevation: | 74.1m (243.1feet)[2] |
| River System: | Lake Ontario drainage basin |
Port Granby Creek (French: ruisseau Port Granby) is a stream in the municipality of Clarington, Regional Municipality of Durham in Ontario, Canada.[3] [4] [5] It feeds into Lake Ontario, which it reaches at the community of Port Granby, after which it is named.
Port Granby Creek begins at the confluence of two unnamed streams at an elevation of [1] southeast of the community of Newtonville. It heads southwest, passes under Ontario Highway 401, and turns south. The creek flows under the Canadian Pacific Railway and Canadian National Railway main lines and reaches its mouth at Lake Ontario at the community of Port Granby. Lake Ontario flows via the Saint Lawrence River to the Gulf of Saint Lawrence.[3]