The Vermilion River is a river located in the United States, primarily flowing through the state of Illinois. It is a tributary of the Wabash River, contributing to the region's water system. The river spans approximately 80 miles and is known for its scenic beauty and recreational opportunities, including fishing and boating. The river's watershed supports diverse ecosystems and wildlife, making it an important natural resource. The Vermilion River also plays a role in local history and culture, with several towns and communities situated along its banks, benefiting from its resources and recreational activities.