The Salmon River is a river in Ontario, Canada. The river flows 135 km south from about 200 metres south of Mazinaw Lake into Kennebec Lake near the community of Arden, part of Central Frontenac, Frontenac County, through a chain of small lakes and through part of Lennox and Addington County to the Bay of Quinte on Lake Ontario near the community of Shannonville, part of Tyendinaga, Hastings County. The watershed is about 227,579 acres (92,100 hectares) of which 65,524 acres is forested.