Henderson IL ZIP Code
Henderson city is located in Illinois State, Knox County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Henderson IL zip code by its streets and block numbers if we have some of the Henderson streets loaded in our website
Henderson Area Code is 309 and Time Zone is Central (GMT -06:00).
Henderson Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Henderson City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Henderson ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Henderson, Illinois.
The Henderson Zip Code is 61439.
If you want to send a mail to Henderson City, you should use the 61439 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Henderson 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 61439 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Henderson 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.