Madison County Illinois is covered by a total of 36 ZIP Codes. There are 12 ZIP Codes in Madison County that extend into adjacent counties (Bond County, Clinton County, Jersey County, Macoupin County, and Saint Clair County). Of the ZIP codes within or partially within Madison County there are 31 Standard ZIP Codes, 1 Unique ZIP Codes and 3 PO Box 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 Madison County and can be turned on and off. Each type of postal code can also be turned on and off.