John W. Riddle
- For others with this name, see John Riddle (disambiguation)
John Wallace Riddle, Jr. (July 12, 1864 – December 8, 1941) was an American diplomat. His first diplomatic assignment was as agent/consul general in Egypt (1904–1905). He was then sent to Romania and Serbia in 1905 to serve as Envoy Extraordinary and Minister Plenipotentiary (residing in Bucharest), followed by postings as U.S. ambassador to Russia (1907–1909) and ambassador to Argentina (1922–1925).
Riddle was the son of John Wallace Riddle, Sr. and Rebecca Blair McClure; he was born after his father's untimely death. A few years later, Rebecca McClure became the second wife of Charles Eugene Flandrau and relocated to St. Paul, Minnesota where Riddle grew up alongside two half-brothers and two step-sisters. He graduated from Harvard in 1887, attended law school at Columbia through 1890, and studied international law, diplomacy, and languages at École Libre des Sciences Politiques and the Collège de France in Paris through 1893.
- "John Wallace Riddle". Office of the Historian, U.S. Department of State. Retrieved 2009-08-09.
- "U.S. Ministers and Ambassadors to Russia". Embassy of the United States, Moscow Russia. Retrieved 2009-08-09.
- Haeg, Lawrence Peter (2004). In Gatsby's Shadow: The Story of Charles Macomb Flandrau. University of Iowa Press.
- Derby, George and James Terry White (1910). The National Cyclopædia of American Biography: Being the History of the United States as Illustrated in the Lives of the Founders, Builders, and Defenders of the Republic, and of the Men and Women who are Doing the Work and Moulding the Thought of the Present Time 14. New York: James T. White & Company.
- "Theodate Pope Riddle". Connecticut Women's Hall of Fame. Retrieved 2009-08-09.