Osco IL ZIP Code
Osco city is located in Illinois State, Henry County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Osco IL zip code by its streets and block numbers if we have some of the Osco streets loaded in our website
Osco Area Code is 309 and Time Zone is Central (GMT -06:00).
Osco Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Osco City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Osco ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Osco, Illinois.
The Osco Zip Code is 61274.
If you want to send a mail to Osco City, you should use the 61274 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Osco 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 61274 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Osco 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.