DeKalb, IL ZIP Code
DeKalb, Illinois has one ZIP code: .
Mail addressed to DeKalb covers nearby places too.
Where the 60115 ZIP code reaches
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: DeKalb city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in DeKalb
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Why your mail may say DeKalb when you live outside it
DeKalb ZIP codes also cover DeKalb Township, Afton Township and Pierce Township, so a letter addressed to DeKalb can go to a home outside the city limits.
A ZIP code does not set your city, school district or tax. DeKalb County property records show which city you are in.
DeKalb ZIP code questions
What is the main ZIP code for DeKalb?
60115, the ZIP code of the main Dekalb post office at 600 E Lincoln Hwy.
What county is DeKalb in?
DeKalb County.
ZIP codes for towns near DeKalb
More towns near DeKalb: Rockford, Bartlett, Crystal Lake, Streamwood, Hanover Park, Carol Stream, Hoffman Estates, Naperville, Plainfield.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections