Chicago - 24 companies
Aurora - 9 companies
Rockford - 13 companies
Joliet - 6 companies
Naperville - 19 companies
Springfield - 7 companies
Peoria - 11 companies
North Peoria - 4 companies
Elgin - 5 companies
Waukegan - 7 companies
Arlington Heights - 1 company
Des Plaines - 1 company
Crystal Lake - 2 companies
Bensenville - 2 companies
Schaumburg - 1 company
Oak Forest - 1 company
Elk Grove Village - 2 companies
Frankfort - 1 company
Franklin Park - 1 company
Lemont - 1 company
Glendale Heights - 1 company
Lake Zurich - 1 company
Lombard - 1 company
Roselle - 2 companies
Loves Park - 1 company
Belvidere - 2 companies
Machesney Park - 2 companies
Sycamore - 1 company
Orland Park - 1 company
O Fallon - 1 company
Lockport - 2 companies
Woodridge - 2 companies
Downers Grove - 2 companies
Lincolnshire - 1 company
Chatham - 1 company
Chillicothe - 1 company
Washington - 1 company
Pekin - 1 company
Bartonville - 2 companies
Urbana - 1 company
Hanna City - 1 company
East Peoria - 2 companies
Libertyville - 1 company
Johnsburg - 1 company
Beach Park - 1 company
Gurnee - 1 company
Moline - 1 company
Normal - 2 companies
Le Roy - 1 company
Collinsville - 1 company
Western Springs - 1 company
Mount Prospect - 1 company