Casco WI ZIP Code
Casco city is located in Wisconsin State, Kewaunee County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Casco WI zip code by its streets and block numbers if we have some of the Casco streets loaded in our website
Casco Area Code is 920 and Time Zone is Central (GMT -06:00).
Casco Zip Code - Wisconsin
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Casco City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Casco ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Casco, Wisconsin.
The Casco Zip Code is 54205.
If you want to send a mail to Casco City, you should use the 54205 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Casco ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 54205 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Casco city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in Wisconsin.