The General Services Administration (GSA) is an independent agency of the United States government established in 1949 to help manage and support the basic functioning of federal agencies. GSA supplies products and communications for U.S. government offices, provides transportation and office space to federal employees, and develops government-wide cost-minimizing policies and other management tasks.

GSA employs about 12,000 federal workers. It has an annual operating budget of roughly $33 billion and oversees $66 billion of procurement annually. It contributes to the management of about $500 billion in U.S. federal property, divided chiefly among 8,700 owned and leased buildings and a 215,000 vehicle motor pool. Among the real estate assets it manages are the Ronald Reagan Building and International Trade Center in Washington, D.C.—the largest U.S. federal building after the Pentagon—and the Hart-Dole-Inouye Federal Center (previously the Battle Creek Sanitarium, run by John Harvey Kellogg).

GSA's business lines include the Federal Acquisition Service (FAS) and the Public Buildings Service (PBS), as well as several Staff Offices including the Office of Government-wide Policy, the Office of Small Business Utilization, and the Office of Mission Assurance. As part of FAS, GSA's Technology Transformation Services (TTS) helps federal agencies improve delivery of information and services to the public. Key initiatives include the Presidential Innovation Fellows program, 18F (includes login.gov and cloud.gov), FedRAMP, the USAGov platform (USA.gov, GobiernoUSA.gov), Data.gov, and Challenge.gov, the U.S. Web Design System, and I.T. Modernization Centers of Excellence.

GSA is a member of the Procurement G6, an informal group leading the use of framework agreements and e-procurement instruments in public procurement.