| Murdock River | |
| Name Other: | French: Rivière Murdock |
| Pushpin Map: | Canada Ontario |
| Pushpin Map Caption: | Location of the mouth of the river in Ontario |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type3: | Region |
| Subdivision Name3: | Northeastern Ontario |
| Subdivision Type4: | District |
| Subdivision Name4: | Sudbury District |
| Source1: | Mud Lake, Ontario |
| Source1 Location: | Servos Township |
| Source1 Coordinates: | 46.2631°N -80.7356°W |
| Source1 Elevation: | 215m (705feet) |
| Mouth: | French River (river) |
| Mouth Location: | French River (municipality) |
| Mouth Coordinates: | 46.0694°N -80.6117°W |
| Mouth Elevation: | 182m (597feet) |
| River System: | Lake Huron drainage basin |
The Murdock River (French: Rivière Murdock) is a river in Sudbury District in Northeastern Ontario, Canada.[1] It is in the Lake Huron drainage basin and is a right tributary of the French River.
The river begins at Mud Lake in geographic Servos Township[2] in Unorganized North Sudbury District. It flows west through Graham Lake, turns south, and is crossed by the Canadian Pacific Railway main line. It enters Lovering Lake at the community of Paget, flows west under Ontario Highway 69 into Kakakiwaganda Lake, then turns sharply east back under Highway 69 to Round Lake. It heads south southeast, passes briefly through the northeast corner of geographic Cox Township,[3] enters the municipality of French River, is crossed by Ontario Highway 64 and Ontario Highway 607, and reaches its mouth at the French River near the central community of French River.