Lake County John Doe was a male whose partial remains were discovered in 1919. He was a possible murder victim found alongside Lake County Jane Doe.
In October 1919, the remains of a male and female were found buried on a farm in Lake County, Illinois. Serial killer H.H. Holmes claimed to have killed a man and woman in Lake County, Illinois before being executed in 1896, however, the remains were not discovered until 23 years after Holmes' execution.