| Boyne River | |
| Pushpin Map: | Canada Southern Ontario |
| Pushpin Map Caption: | Location of the mouth of the Boyne River in southern Ontario |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type3: | Region |
| Subdivision Name3: | Central Ontario |
| Subdivision Type4: | District Municipality |
| Subdivision Name4: | Muskoka |
| Subdivision Type5: | Municipality |
| Subdivision Name5: | Lake of Bays |
| Source1: | Fowler Lake (Muskoka District) |
| Source1 Coordinates: | 45.4053°N -79.0333°W |
| Source1 Elevation: | 403m (1,322feet) |
| Mouth: | Lake of Bays |
| Mouth Coordinates: | 45.3297°N -79.0167°W |
| Mouth Elevation: | 315m (1,033feet) |
| River System: | Great Lakes Basin |
| Tributaries Left: | Sixteen Mile Creek |
The Boyne River is a river in the municipality of Lake of Bays, District Municipality of Muskoka in Central Ontario, Canada.[1] It is part of the Great Lakes Basin, and flows from Fowler Lake to its mouth at Dwight Bay on the Lake of Bays near the community of Dwight on Ontario Highway 60. The Lake of Bays flows via the Muskoka River, then the Moon River and Musquash River to Georgian Bay on Lake Huron.