Ambassador to the United Nations

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 more 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 Security Council of the United Nations"; it is also known as the U.S. Permanent Representative to the United Nations. There is also a deputy ambassador who assumes the duties of the ambassador in his or her absence. Like all United States ambassadors, the ambassador to the UN and the deputy ambassador are nominated by the U.S. president and confirmed by the Senate. The ambassador serves at the pleasure of the president.

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

Cabinet status
Henry Cabot Lodge Jr., a leading moderate Republican who lost his seat in the United States Senate to John F. Kennedy in the 1952 elections, was appointed ambassador to the United Nations in 1953 by Dwight D. Eisenhower in gratitude for the defeated senator's role in the new president's defeat of conservative leader Robert A. Taft for the 1952 Republican nomination and subsequent service as his campaign manager in the general election; Eisenhower raised the ambassadorship to cabinet rank in order to give Lodge direct access to him without having to go through the State Department.

The ambassadorship continued to hold this status through the Reagan administration but was removed from cabinet rank by George H. W. Bush, who had previously held the position himself. It was restored under the Clinton administration. It was not a cabinet-level position under the George W. Bush administration (from 2001 to 2009), but was once again elevated under the Obama administration, and retained as such by the Trump administration.

Former UN ambassador and national security advisor John R. Bolton has publicly opposed the granting of cabinet-level status to the office, stating "One, it overstates the role and importance the U.N. should have in U.S. foreign policy, second, you shouldn't have two secretaries in the same department".

List of ambassadors
The following is a chronological list of those who have held the office: