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: 4,067
PO Box Addresses: 3,644
Residential Addresses: 52,633
Multi-Family Addresses: 3,717
Single Family Addresses: 48,916
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Map of Williamson County, IL ZIP Codes With Actual (Default) City Names