L. Craig Johnstone (born September 1, 1942) is an American former diplomat who served as the U.N. Deputy High Commissioner for Refugees.

A Vietnamese linguist by training, he worked first with the U.S. Agency for International Development, and then with the U.S. State Department.

[1] Upon returning to the United States, he became a Fellow with the Council on Foreign Relations, and then with the Institute of Politics at Harvard University.

He went back to Vietnam in 1975 on a rescue mission for Vietnamese citizens who had assisted the United States, and then continued his refugee work as part of a team assisting in the resettlement of Vietnamese refugees.

[1][3] He worked for Cabot Corporation in Brussels between 1989 and 1994, and then returned to government to serve as director for resources, plans and policy in the Office of the Secretary of State from 1994 to 1999.