List of ambassadors of the United States to the United Nations

Permanent Representative of the United States of America to the United Nations
Seal of the Department of State
Incumbent Linda Thomas-Greenfield since February 25, 2021
United States Mission to the United Nations
Style	Madam Ambassador (informal) The Honorable (formal) Her Excellency (diplomatic)
Member of	National Security Council Cabinet
Reports to	President Secretary of State
Residence	50 United Nations Plaza
Seat	United Nations Headquarters New York City, New York, U.S.
Appointer	President with Senate advice and consent
Term length	No fixed term At the pleasure of the President of the United States
Formation	December 21, 1945; 78 years ago (1945-12-21)
First holder	Edward Stettinius Jr.
Salary	Executive Schedule, Level IV
Website	usun.usmission.gov

The United States ambassador to the United Nations is the leader of the U.S. delegation, the U.S. Mission to the United Nations. The position is formally known as the permanent representative of the United States of America to the United Nations, with the rank and status of ambassador extraordinary and plenipotentiary, and representative of the United States of America in the United Nations Security Council.

The deputy ambassador assumes the duties of the ambassador in his or her absence. As with all United States ambassadors, the ambassador to the UN and the deputy ambassador are nominated by the president of the United States and confirmed by the Senate. The ambassador serves at the pleasure of the President. The ambassador may be assisted by one or more appointed delegates, often appointed for a specific purpose or issue.

The U.S. permanent representative is charged with representing the United States on the UN Security Council, and during all plenary meetings of the General Assembly, except when a more senior officer of the United States (such as the secretary of state or the president of the United States) is in attendance.

Despite his or her title head of external mission, the United States ambassador to the United Nations is also responsible for importing United Nations policies and motions voted in the main organs of the United Nations onton the national territory.

The current ambassador is Linda Thomas-Greenfield, who was nominated by President Joe Biden and confirmed by the Senate on February 23, 2021.