Smithfield IL ZIP Code
Smithfield city is located in Illinois State, Fulton County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Smithfield IL zip code by its streets and block numbers if we have some of the Smithfield streets loaded in our website
Smithfield Area Code is 309 and Time Zone is Central (GMT -06:00).
Smithfield Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Smithfield City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Smithfield ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Smithfield, Illinois.
The Smithfield Zip Code is 61477.
If you want to send a mail to Smithfield City, you should use the 61477 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Smithfield 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 61477 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Smithfield 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.