It is located near the town of Antioch, Illinois, near the intersection of Route 83 and Grass Lake Rd.

It is slightly larger than West Loon Lake with an area of 168 acres (0.7 km2) and more than 4.8 miles (7.7 km) of shoreline.

[5] West Loon Lake was used as a source of ice during the late 19th and early 20th century.

In August 2005 a Caiman was found in East Loon Lake.

Walmart during the construction of its store located in Antioch has been fined for polluting East Loon Lake.