Lee Tae-sik (born 26 October 1945) is a South Korean diplomat. He graduated from Seoul National University's Department of International Relations in 1970. He then joined the Ministry of Foreign Affairs and Trade, and was employed as first secretary in the South Korean embassy in Washington, D.C. from 1981 to 1984. He later went on to pursue a higher degree at the Johns Hopkins School of Advanced International Studies, graduating in 1988.