- Addison
- Addison township
- Belleville
- Berwyn
- Carbondale
- Carbondale Township
- Carterville
- Casey
- Charleston
- Charleston township
- Chicago
- Clinton
- Des Plaines
- Dundee
- Effingham
- Elgin
- Frankfort
- Galesburg
- Goreville
- Granite City
- Hampshire
- Hampshire Township
- Herrin
- Joliet
- Lisle township
- Litchfield
- Macomb
- Marengo
- Marion
- Mattoon
- Mattoon Township
- Mazon
- Mazon Township
- McHenry
- Mokena
- Morris
- Mt Vernon
- Murphysboro
- Naperville
- Orland Park
- Palatine Township
- Rockford
- Rockford Township
- Schaumburg Township
- Skokie
- Thornton Township
- Tinley Park
- Waterloo
- Waukegan
- Waukegan Township
Illinois Real Estate Agents
Top zip codes in Illinois with CENTURY 21 agents
View all zip codes with CENTURY 21 agents
Protect your home and budget with an American Home Shield© home warranty. Learn more©2025 Century 21 Real Estate LLC. All rights reserved. CENTURY 21®, the CENTURY 21 Logo and C21® are service marks owned by Century 21 Real Estate LLC. Century 21 Real Estate LLC fully supports the principles of the Fair Housing Act and the Equal Opportunity Act. Each office is independently owned and operated. Listing information is deemed reliable but not guaranteed accurate.