Our Mission

By conducting audits, evaluations, and investigations, the OIG fulfills its mission of ensuring efficiency, accountability, and integrity in the U.S. Postal Service. Additionally, the OIG reviews existing and proposed legislation and regulations, and it keeps the USPS Board of Governors and Congress fully informed of problems and deficiencies relating to Postal Service programs and operations.

Our Work

The OIG plays a key role in maintaining the integrity and accountability of America's postal service, its revenue and assets, and its employees. With more than $71 billion in revenue, the Postal Service is at the core of a more than $1.6 trillion U.S. mailing industry that employs approximately 7.3 million people. The more than 640,000 total employees of the Postal Service compose one of the largest civilian federal workforces in the country.

Delivering approximately 143 billion pieces of mail yearly to 160 million delivery points and operating more than 31,000 postal facilities, America's postal system is one of the government's most trusted entities.

The USPS OIG, an independent agency within the Postal Service under the general supervision of nine presidentially-appointed governors, employs more than 1,000 auditors, investigators, and professional support personnel stationed in more than 90 offices. Every day they work to meet the challenge of preserving this trust by detecting and preventing fraud, waste, and abuse in Postal Service programs and operations.




Our Commitment to Diversity, Equity, and Inclusion

At the OIG, we strive to create an environment in which we share our similarities and celebrate our differences. However, diversity without inclusion only reinforces systemic barriers. And to grow diversity and inclusion, we must ensure equity. The OIG’s commitment to these issues is detailed in our Statement on Equal Employment Opportunity and Diversity.



Our second annual report summarizes what we accomplished in FY22 and serves as a blueprint for how we will continue to improve our DEI efforts in the future. This work does not come with a playbook — finding the right formula for success takes a real commitment from every person here at the OIG. Our journey has taught us an invaluable lesson: DEI is in everyone’s interest and therefore everyone can make a difference.


Celebrating 25 Years

Congress passed legislation in 1996 to establish the Postal Service Office of Inspector General as an independent entity with an Inspector General reporting directly to the USPS Governors. Before then, the Postal Inspection Service had conducted oversight of the Postal Service and reported to the Postmaster General.

We have done so many different types of work over the past 25 years. Our work is often reflected in postal reform legislation, and Congress has asked the OIG to testify numerous times on a variety of postal issues. And over the years we have suggested multiple ideas for how the Postal Service could increase revenue and provide needed services. For a more detailed look at what we have done over the past 25 years, watch the accompanying video here.