On July 1, 1963, the U.S. Post Office Department introduced the ZIP code program to get a handle on the heaping surplus of mail. Today, those five digits represent much more for American society.

The U.S. Postal Service started using the current ZIP code system in 1963. This is what each digit means and how they get mail into your mailbox.

Green officials say the current system, which splits the city between multiple postal codes, creates tax collection problems ...

The U.S. Postal Service began using the five-digit ZIP code in 1963. In recognition of the anniversary, we've examined the list of more than 40,000 ZIP codes and highlighted a few that deserve ...

The House passed two bills Monday night that would authorize the U.S. Postal Service to create 76 new ZIP codes for communities nationwide.  These ...

City's street addresses are scattered across ZIP codes in four other towns, causing tax confusion and emergency response ...