The man was pulled from shallow water and an autopsy shows the death is consistent with drowning.
He was wearing an adidas hat, blue shorts, Nike shoes, a silver ring, and a Tahari watch.
He's described as a white male, late 50s to early 70s, standing at five-foot-three, with gray hair and balding on top.
Anyone with information is asked to call the Lake County Coroner's Office at 847-377-2200.