Arizona State University (Arizona State or ASU) is a public research university in Tempe, Arizona, United States. Founded in 1885 as Territorial Normal School by the 13th Arizona Territorial Legislature, the university is one of the largest public universities by enrollment in the United States. It was one of about 180 "normal schools" founded in the late 19th century to train teachers for the rapidly growing public common schools. Some closed, but most steadily expanded their role and became state colleges in the early 20th century, then state universities in the late 20th century.
One of three universities governed by the Arizona Board of Regents, Arizona State University is a member of the Association of American Universities (AAU) and is classified among "R1: Doctoral Universities – Very High Research Activity". As of fall 2025, ASU has 160,051 students enrolled, with 81,541 students attending online, across its four campuses and four regional learning centers throughout Arizona. ASU offers more than 400 undergraduate degree programs from its 16 colleges and over 170 cross-discipline centers and institutes for students. It also offers more than 450 graduate degree and certificate programs.