Mark Wylea Erwin (born March 30, 1944) is a former U.S. ambassador and the president of Erwin Capital, Inc., a family-owned investment company in Charlotte, North Carolina.

[citation needed] In 1997, President Bill Clinton appointed him to the board of directors of the Overseas Private Investment Corporation.

[citation needed] Erwin's books include An Unlikely Journey - Make a Difference.

Have Fun, Life's Lessons: Lines of Wisdom from a Faithful Stream and The Practical Ambassador.

Erwin was an adjunct professor at the Business School of Winthrop University for several years.