Floyd Olin Smith (December 1, 1885 – August 6, 1961) was an American physician who served in the Ottoman Empire (1913–1917) and the Philippines (1918–1927) under Near East Relief and the Red Cross. During his time in the Ottoman Empire, Smith was a caretaker of many Armenians who were victims of the Armenian genocide. He wrote extensively about the treatment of his patients and provided detailed medical assessments of each of them. Smith later worked in the Philippines for nine years, and remained in there for another thirty years. During World War II, he was captured by Japanese forces and was held as a prisoner of war. He returned to the United States where he spent the rest of his life.