Sterling IL ZIP Code
Sterling city is located in Illinois State, Whiteside County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Sterling IL zip code by its streets and block numbers if we have some of the Sterling streets loaded in our website
Sterling Area Code is 815 and Time Zone is Central (GMT -06:00).
Sterling Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Sterling City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Sterling ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Sterling, Illinois.
The Sterling Zip Code is 61081.
If you want to send a mail to Sterling City, you should use the 61081 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Sterling 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 61081 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Sterling 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.