The University of San Agustin (commonly referred to as San Agustin, San Ag, or USA) is a private Catholic university in Iloilo City, Philippines. With 40 initial students, it was established in 1904 as a preparatory school for boys by the Spanish Catholic missionaries under the oldest religious Roman Catholic order in the Philippines during the American colonial period, the Order of Saint Augustine (San Agustin). In 1917, it was incorporated and became Colegio de San Agustin de Iloilo. In March 1953, San Agustin attained university status making it the first university in Western Visayas. San Agustin is the first and only Augustinian university in the Asia-Pacific region.