The United States Ambassador to the United Nations is the leader of the U.S. delegation, the U.S. Mission

United States Mission to the United Nations

The United States Mission to the United Nations is the formal title of the United States delegation to the United Nations .Each nation at the UN has a similar delegation, although only a few are members of the UN Security Council...

 to the United Nations

United Nations

The United Nations is an international organization whose stated aims are facilitating cooperation in international law, international security, economic development, social progress, human rights, and achievement of world peace...

. The position is more formally known as the "Permanent Representative of the United States of America

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 to the United Nations

United Nations

The United Nations is an international organization whose stated aims are facilitating cooperation in international law, international security, economic development, social progress, human rights, and achievement of world peace...

, 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

United Nations Security Council

The United Nations Security Council is one of the principal organs of the United Nations and is charged with the maintenance of international peace and security. Its powers, outlined in the United Nations Charter, include the establishment of peacekeeping operations, the establishment of...

"; it is also known as the U.S. Permanent Representative, or "Perm Rep", to the United Nations.

The U.S.