Caseyville IL ZIP Code
Caseyville city is located in Illinois State, Saint Clair County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Caseyville IL zip code by its streets and block numbers if we have some of the Caseyville streets loaded in our website
Caseyville Area Code is 618 and Time Zone is Central (GMT -06:00).
Caseyville Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Caseyville City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Caseyville ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Caseyville, Illinois.
The Caseyville Zip Code is 62232.
If you want to send a mail to Caseyville City, you should use the 62232 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Caseyville 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 62232 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Caseyville 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 Illinois.