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.

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

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 ...