Southern Illinois University is a public research university located in Carbondale, Illinois, United States. Founded in 1869, SIU is the flagship campus of the Southern Illinois University system. (The other members are Southern Illinois University Edwardsville, Southern Illinois University School of Medicine, Southern Illinois School of Law, and Southern Illinois University School of Dental Medicine.) The university is known as SIU Carbondale, but colloquially as SIU. SIU's total student enrollment is 17,292.