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 Williamson County Address Data
Businesses Addresses: 4,069
PO Box Addresses: 3,591
Residential Addresses: 52,668
Multi-Family Addresses: 3,737
Single Family Addresses: 48,931
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Map of Williamson County, IL ZIP Codes With Actual (Default) City Names