Princeton IL ZIP Code
Princeton city is located in Illinois State, Bureau County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Princeton IL zip code by its streets and block numbers if we have some of the Princeton streets loaded in our website
Princeton Area Code is 815 and Time Zone is Central (GMT -06:00).
Princeton Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Princeton City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Princeton ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Princeton, Illinois.
The Princeton Zip Code is 61356.
If you want to send a mail to Princeton City, you should use the 61356 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Princeton 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 61356 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Princeton 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.