The USPS is among one of many companies gearing up to best serve customers during the holiday season. Here's what happens next.

First class mail is typically delivered from 1-5 days, while marketing materials, periodicals and packages are delivered in one, two or three-day service.

The US Postal Service is giving a first look at its newest stamp lineup, with designs that honor American icons, cultural ...

In the 1970s, NASA partnered with the U.S. Postal Service on an overlooked project that helped shape modern EV development.