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: 4,354
PO Box Addresses: 4,240
Residential Addresses: 52,041
Multi-Family Addresses: 3,765
Single Family Addresses: 48,276
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Map of Williamson County, IL ZIP Codes With Actual (Default) City Names
