Gerlaw IL ZIP Code
Gerlaw city is located in Illinois State, Warren County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Gerlaw IL zip code by its streets and block numbers if we have some of the Gerlaw streets loaded in our website
Gerlaw Area Code is 309 and Time Zone is Central (GMT -06:00).
Gerlaw Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Gerlaw City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Gerlaw ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Gerlaw, Illinois.
The Gerlaw Zip Code is 61435.
If you want to send a mail to Gerlaw City, you should use the 61435 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Gerlaw 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 61435 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Gerlaw 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.