Gurnee is a village in Lake County, Illinois, United States. The village borders the city of Waukegan and is considered a part of the Chicago metropolitan area. Gurnee is perhaps best known for being the location of Six Flags Great America, a theme park. According to the United States Census Bureau, the village has a total area of 13.4 square miles (35km2), of which, 13.4 square miles (35km2) is land and 0.07% is water. Gurnee is located on the banks of the Des Plaines River and is split by Interstate 94 which divides the village into East (old) and west (new) sides.