Charles Eucharist de Medicis Sajous (December 13, 1852 – April 27, 1929) was an American endocrinologist, laryngologist, and writer based in Philadelphia. He was a prolific writer and editor of medical textbooks and encyclopedias, and was the first president of the Endocrine Society. He held professorships at the University of Pennsylvania, Temple University, and the Medico-Chirurgical College of Philadelphia.