The Waukegan River, a small river in Lake County, Illinois, is a member of the very small class of Illinois rivers that flow into Lake Michigan. It drains part of the city of Waukegan, Illinois, including the city's historic downtown area. The river's drainage area comprises 7,785.63 acres. The drainage is managed by the city of Waukegan.
Length: 3 mi (4.8 km)
Progression: Waukegan River → Lake Michigan → Great Lakes → Saint Lawrence Seaway → Gulf of Saint Lawrence