DeKalb County Illinois is covered by a total of 22 ZIP Codes. There are 16 ZIP Codes in DeKalb County that extend into adjacent counties (Boone County, Kane County, Kendall County, LaSalle County, Lee County, Mchenry County, and Ogle County). Of the ZIP codes within or partially within DeKalb County there are 21 Standard ZIP Codes.
Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of DeKalb County and can be turned on and off. Each type of postal code can also be turned on and off.
| ZIP Code | ZIP Code City/Town | ZIP Code Type | |||
|---|---|---|---|---|---|
| Clare | Standard | |||
| Cortland | Standard | |||
| DeKalb | Standard | |||
| Esmond | Standard | |||
| Genoa | Standard | |||
| Hampshire | Standard | |||
| Kingston | Standard | |||
| Kirkland | Standard | |||
| Malta | Standard | |||
| Maple Park | Standard | |||
| Marengo | Standard | |||
| Sycamore | Standard | |||
| Earlville | Standard | |||
| Hinckley | Standard | |||
| Lee | Standard | |||
| Leland | Standard | |||
| Sandwich | Standard | |||
| Shabbona | Standard | |||
| Somonauk | Standard | |||
| Waterman | Standard | |||
| Monroe Center | Standard | |||
| Rochelle | Standard |