American ambassador

This is a list of ambassadors of the United States to individual nations of the world, to international organizations, and to past nations, as well as ambassadors-at-large.

Ambassadors are nominated by the President and confirmed by the U.S. Senate. An ambassador can be appointed during a recess, but he or she can only serve as ambassador until the end of the next session of Congress unless subsequently confirmed. Ambassadors serve "at the pleasure of the President", meaning they can be dismissed at any time.

An ambassador may be a career Foreign Service Officer (career diplomat - CD) or a political appointee (PA). In most cases, career foreign service officers serve a tour of approximately three years per ambassadorship whereas political appointees customarily tender their resignations upon the inauguration of a new president. As embassies fall under the State Department's jurisdiction, ambassadors answer directly to the Secretary of State.

In late May 2017, under president Donald J. Trump a quarter of the countries in the world do not have a U.S. ambassador. The United States lacks ambassadors to NATO, the European Union, France, Germany, and Russia. 200 positions at the State Department require Senate confirmation, including key ambassadorships, the vast majority of which remain unfilled.

Current ambassadors from the United States to international organizations:

Current Ambassadors-at-Large from the United States with worldwide responsibility:

Senior diplomatic representatives of the United States hosted in posts other than embassies. Unlike other consulates, these persons report directly to the Secretary of State.

These diplomatic officials report directly to the Secretary of State. Many oversee a portfolio not restricted to one nation, often an overall goal, and are not usually subject to Senate confirmation.

Well-known past ambassadors from the United States:

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