The Sydenham River is a river located in southwestern Ontario, Canada. It flows through the municipality of Chatham-Kent and is approximately 100 kilometers long. The river is known for its scenic beauty and is a popular spot for recreational activities such as fishing, kayaking, and canoeing. The Sydenham River is part of the Great Lakes watershed and eventually drains into the Lake St. Clair. It supports a diverse ecosystem, including various fish species and wildlife. The river also plays a role in local agriculture, providing irrigation and water resources for nearby farms.