Lake County, the northeastern most county in the state of Illinois, was carved from the surrounding counties in 1839.
Barrington, IL is in Lake county.
Forest Lake, IL is in Lake county.
Deerfield, IL is in Lake county.
Channel Lake, IL is in Lake county.
Lake Catherine, IL is in Lake county.
Long Lake, IL is in Lake county.
Lake Bluff, IL is in Lake county.
Gages Lake, IL is in Lake county.
Fox Lake, IL is in Lake county.
Island Lake, IL is in Lake county.
Lake County.
Villa Park is in DuPage County.