Preparing Children to Stay Alone (May 2001), by the Illinois Department of Children & Family Services (DCFS), has the following information about the legal age to be left home alone in Illinois:
What is lack of supervision?
Illinois law defines a neglected minor, in part, as "any minor under the age of 14 years whose parent or other person responsible for the minor's welfare leaves the minor without supervision for an unreasonable period of time without regard for the mental or physical health, safety or welfare of that minor."
Juvenile Court Act, 705 ILCS 405/2-3(1)(d)
How long may a child be left alone?
What is appropriate under certain circumstances may be considered child neglect in other circumstances.
While recognizing that many factors may apply, Illinois law lists 15 specific factors to be considered when deciding whether a child has been left alone for an unreasonable period of time.
This information is available on the Web at
http://www.state.il.us/dcfs/docs/alone.doc.