United States Postal Service

Organization and role

USPS functions as an independent agency of the federal government with a nationwide network of processing centers, post offices, sorting facilities, and delivery routes. It is responsible for maintaining delivery standards, issuing postage stamps, and administering addressing systems that support reliable mail movement. Key management roles include the Postmaster General and a governing Board of Governors that oversees policy and long-term strategy.

Services and operations

The agency offers a range of services for individuals and businesses. Major service categories include:

• Domestic letter and card delivery — first-class and standard mail for everyday correspondence.
• Package services — time-definite and economy options for parcels.
• Retail services — stamps, mailing supplies, PO boxes, and certified mail at post offices.
• Special services — bulk mail, periodicals, international mail, and delivery confirmation.

History and development

The modern USPS was established after federal postal reform passed in the Postal Reorganization Act, replacing the earlier United States Post Office Department. The agency built on centuries of postal practice in North America, adopting innovations such as ZIP Codes and mechanized sorting to increase speed and reliability. Over time it has adapted to changing communications by expanding package operations as electronic messaging reduced first-class letter volumes.

Funding, regulation, and distinctives

Unlike many government agencies, USPS obtains most revenue from the sale of postage, products, and services rather than direct annual appropriations. It operates under federal law with a universal service obligation to deliver to every address. While it competes with private carriers on package delivery, its legal mandate to serve all communities — including remote and low-density areas — is a defining characteristic.

Importance and notable facts

USPS supports commerce, communication, and civic life: delivering ballots, medications, bills, and small-business goods. Its iconic elements—postage stamps, postmarks, and local post offices—remain widely recognized. For more historical context and official material see the institutional reference to the predecessor agency at United States Post Office Department and national information about the United States at United States.