Jeff,
Here's the website for the AOH in the US.
http://www.aoh.comThere's a list by state of the local divisions that have websites. If you click on John F. Kennedy Division 59 in Chicago you'll see another list of the Divisions in Illinois. There's still one in Decatur. Division 59 should be able to give you the contact information about that Division as well as information on the AOH hierarchy.
Eilís O'Hara