Skip to main content

United States Postal Service: United State Postal Service

United State Postal Service

The United States Postal Service (USPS) is an independent agency of the United States federal government responsible for providing postal service in the United States. It is one of the few government agencies explicitly authorized by the United States Constitution.




Sudoc Number Publication

P 1.10/8:

ZIP Code Look-Up

P 1.10/5:

International Mail Manual

P 1.12/11:

Domestic Mail Manual