River - Vermilion-Wabash Basin
The Vermilion River in eastern Illinois is a tributary of the Wabash River. Within Illinois, the Vermilion River has a length of 95 miles and a drainage area of approximately 1,300 square miles. Its major tributaries include Salt Fork Vermilion River and North Fork Vermilion River. The Vermilion River originates in Ford County as Big Four Ditch, which becomes the Middle Fork Vermilion River. Beginning at the confluence of the Middle Fork and the Salt Fork, the river is referred to as the Vermilion. With the additional drainage of the North Fork near Danville, the Vermilion flows southeast until it enters the Wabash River in Indiana. This river should not be confused with the Vermilion River in east-central Illinois, which drains to the Illinois River.