Note: Every ZIP Code has a single ACTUAL City Name assigned by the US Postal Service (USPS).
See the specific ZIP Code for acceptable Alternate City Names and spelling variations.
ZIP Codes in Saint Clair County Address Data
Businesses Addresses: 9,672
PO Box Addresses: 3,179
Residential Addresses: 141,906
Multi-Family Addresses: 6,697
Single Family Addresses: 134,984
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Map of Saint Clair County, IL ZIP Codes With Actual (Default) City Names
