The Vermilion River is a 74.8-mile-long tributary of the Illinois River in the state of Illinois, United States. The river flows north, in contrast to a second Vermilion River in Illinois, which flows south to the Wabash River. The Illinois and Wabash rivers each have a tributary named the Little Vermilion River as well.
Length: 75 mi (121 km)
Progression: Vermilion River → Illinois → Mississippi → Gulf of Mexico
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