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 Winnebago County Address Data
Businesses Addresses: 10,118
PO Box Addresses: 3,449
Residential Addresses: 139,568
Multi-Family Addresses: 11,622
Single Family Addresses: 126,877
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Map of Winnebago County, IL ZIP Codes With Actual (Default) City Names