John Caspar Dreier

John Caspar Dreier (December 27, 1906 – March 10, 1994) was a U.S. diplomat.

He served as United States Ambassador to the Organization of American States between 1951 and 1960. He then taught for a number of years at the School of Advanced International Studies (part of Johns Hopkins University in Washington, D.C.). After retirement he played an active role as a teacher and trustee of the College of the Atlantic in Bar Harbor, Maine.

Publications

• Organization of American States and the Hemisphere Crisis (Harper & Row, 1962)
• The Alliance for Progress: Problems and Perspectives (Editor) (Johns Hopkins University Press, 1962)
• International Organization in the Western Hemisphere (Co-author) (Syracuse University Press, 1968).