This article contains several lists of ambassadors from the United States. There are also individual articles listing the holders of many of the ambassadorial offices, for which see.
The incumbents change from time to time; sometimes a post starts or stops being temporarily headed by a lower ranking diplomat. Occasionally, a post is created or abolished.
^ ab The U.S. Ambassador to Spain—resident in Madrid—is also accredited to Andorra.
^ abcdefg One ambassador, accredited to Antigua and Barbuda, Barbados, Dominica, Grenada, Saint Kitts and Nevis, Saint Lucia, and Saint Vincent and the Grenadines, is resident at Bridgetown, Barbados.
^ The United States does not currently maintain diplomatic relations with Bhutan.
^ ab In 1989 the military government of Burma changed the name of the nation to Myanmar, but the United States government—and other Western governments—do not accept the name and still refer to the country as Burma in official usage. See Myanmar.
^ The US has not had an ambassador to Burma since 1990.