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

A letter without a ZIP code may not reach its intended destination. That is because of the way addresses are read by automated postal systems.

They are the five numbers that stand for home. Since 1963, ZIP codes have been a part of just about every piece of mail that travels through our system. But what do those numbers stand for?

Why are zip codes and postal codes important when it comes to credit card transactions and when do they overlap for Canadian credit card users?

Queen Creek’s rapid growth has triggered the U.S. Postal Service to add a new ZIP code to the area that will go into effect July 1. The new ZIP code is 85144 for residents that live south of ...

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