Saint Louis University, also referred to by its acronym SLU, () is a private Catholic research basic and higher Educational institution run by the Congregation of the Immaculate Heart of Mary in A. Bonifacio Street, Baguio City, Philippines. It was founded in December 1, 1911 by the CICM Missionaries. It offers programs at the elementary, secondaryundergraduate and graduate levels. It has campuses throughout the Baguio metropolitan area. SLU is PAASCU-accredited and one of the universities in the Cordillera administrative region which passed the newly-mandated CHED's Institutional Sustainability Assessment. It is under the CICM Philippines School Network or CICM-PSN. It is the oldest of the CICM-PSN schools. The patron saint of the university is St. Aloysius de Gonzaga. It is the largest university north of Manila with more than 40,000 students (elementary, high school and college combined) as of A.Y. 2018-2019.