The Ottawa River is a major waterway in Ontario and Quebec, Canada.
Ottawa River may also refer to:
- Ottawa River (Auglaize River tributary), in Ohio, United States
- Ottawa River (Lake Erie), in Michigan and Ohio in the United States, which drains into Lake Erie
- Ottaway River, an archaic name of the Boardman River in the northwest of Michigan's Lower Peninsula
This disambiguation page lists articles associated with the title Ottawa River.
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