Saint Louis University (SLU, /ˈsluː/) is a private, co-educational Jesuit university located in St. Louis, Missouri, United States. Founded in 1818 by the Most Reverend Louis Guillaume Valentin Dubourg SLU is the oldest university west of the Mississippi River. It is one of 28 member institutions of the Association of Jesuit Colleges and Universities. The university is accredited by the North Central Association of Colleges and Secondary Schools. SLU's athletic teams compete in NCAA's Division I and the Atlantic 10 Conference. It has a current enrollment of 13,785 students representing all 50 states and more than 77 foreign countries. There are currently 8,406 undergraduate students enrolled in SLU as well as 2,437 graduate students and 2,942 professional students. This year?s enrollment marks the first year that SLU?s enrollment passed 13,000. Of all the students, 59 percent are from out of state. The university provides undergraduate, graduate and professional programs. Its average class size is 23 and the student-faculty ratio is 13:1.