Richard Lee Buangan is an American diplomat who has served as United States ambassador to Mongolia since November 2022.

He currently serves as the Principal Deputy Assistant Secretary in the Bureau of Global Public Affairs at the U.S State Department.

Earlier, Buangan served as managing director for International Media in the Bureau of Public Affairs, as the Public Affairs Officer of the then-U.S. Consulate General, Jerusalem, and as Deputy Press Attaché and then as Embassy Spokesperson of the U.S. Embassy in Beijing, China.

Buangan had also served as a staff officer in the Executive Secretariat of the Department of State, and held overseas assignments in Paris, France and Abidjan, Ivory Coast.

[4] On April 22, 2022, President Joe Biden announced his intent to nominate Buangan to be the next United States ambassador to Mongolia.