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. Back ...

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

The USPS already works with local communities to resolve similar requests by allowing customers to use their preferred city ...

New USPS delivery standards could slow mail for some customers and speed it up for others. Here's what online shoppers need ...