United States Mission to the United Nations

The U.S. Mission to the United Nations (USUN) serves as the United States’ delegation to the United Nations. USUN is responsible for carrying out the nation’s participation in the world body. In 1947 the United States Mission was created by an act of Congress to assist the President and the Department of State in conducting United States policy at the United Nations. Since that time, USUN has served a vital role as the Department of State’s UN branch. Today, USUN has approximately 150 people on staff who serve to represent the United States’ political, economic and social, legal, military, public diplomacy and management interests at the United Nations. USUN is divided into the following sections – Executive; Washington; Political; Management and Reform; Economic and Social; Legal; Military Staff; Public Affairs; Host Country; Management; and Security. The United States Mission to the United Nations is located at 799 United Nations Plaza (between E. 44th and E. 45th on First Ave) across the street from United Nations Headquarters. More than 100 Foreign and Civil Service personnel work at the US Mission to the United Nations. Learn more about the Ambassadors who lead us in carrying out the priorities of the United States at the United Nations.