The Elliott School of International Affairs (known as the Elliott School or ESIA) is the professional school of international relations, foreign policy, and international development of the George Washington University, in Washington, D.C. It is the largest school of international relations in the United States.

The Elliott School is located across from the U.S. State Department and the Organization of American States, and closely to the White House, the World Bank, and the International Monetary Fund. It hosts the Institute for International Economic Policy and The Project on Forward Engagement.

Elliott School alumni and faculty have included ambassadors, diplomats, politicians, and public figures, including heads of state and government, U.S. senators, prominent politicians, NATO officials, U.N. ambassadors, and foreign ministers. Since January 2021, Alyssa Ayres has served as dean, the first woman to hold the post.