What is the postal state abbreviation of Wisconsin?
WI
WC
WN
WS
You'll get the next one!
The postal state abbreviation of Wisconsin is WI. The United States Postal Service (USPS) has established a set of uppercase abbreviations to help process mail with optical character recognition and other automated equipment. There are also official USPS abbreviations for other parts of the address, such as street designators (street, avenue, road, etc.).
