| Tonawanda Creek | |
| Pushpin Map: | Canada Ontario |
| Pushpin Map Caption: | Location of the mouth of Tonawanda Creek in Ontario |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type3: | Region |
| Subdivision Name3: | Central Ontario |
| Subdivision Type4: | Districts |
| Source1: | Unnamed lake |
| Source1 Location: | Kearney, Parry Sound District |
| Source1 Coordinates: | 45.5958°N -79.1064°W |
| Source1 Elevation: | 422m (1,385feet) |
| Mouth: | Big East River |
| Mouth Location: | Lake of Bays, District Municipality of Muskoka |
| Mouth Coordinates: | 45.4686°N -79.0661°W |
| Mouth Elevation: | 337m (1,106feet) |
| River System: | Great Lakes Basin |
| Tributaries Right: | Little Tonawanda Creek |
Tonawanda Creek is a creek in Central Ontario, Canada.[1] It is part of the Great Lakes Basin and is a right tributary of the Big East River.
The creek rises at an unnamed intermittent lake near the community of Ravensworth in the municipality of Kearney in Parry Sound District. It then flows southwest, then southeast, passes over the Banning Dam, takes in the right tributary Little Tonawanda Creek, and reaches its mouth at the Big East River in the township of Lake of Bays, Muskoka District Municipality. The Big East River flows via the North Branch Muskoka River, then the Moon River and Musquash River to Lake Huron.