Michael Hayden Armacost (born April 15, 1937)[1] is a retired American diplomat and a fellow at Stanford University's Freeman Spogli Institute.

The Fellowship, awarded on a strictly non-partisan basis, offers exceptional young leaders first-hand experience working at the highest levels of federal government.

In January 1977 Armacost was selected as a member of the National Security Council to handle East Asian and Chinese affairs under the Carter administration until July 1978, when he was replaced by Nicholas Platt.

He also co-edited, with Daniel Okimoto, The Future of America's Alliances in Northeast Asia, published in 2004 by Stanford Walter H. Shorenstein Asia-Pacific Research Center.

[4] Armacost has served on numerous corporate and nonprofit boards, including TRW, AFLAC, Applied Materials, USEC, Inc., Cargill, Inc, Carleton College, and The Asia Foundation.