Arizona State University is a public metropolitan research university on four campuses across the Phoenix metropolitan area, and four regional learning centers throughout Arizona. ASU is one of the largest public universities by enrollment in the U.S. As of fall 2018, the university had about 80,000 students attending classes across its metro campuses, including 66,000-plus undergraduates and more than 12,000 postgraduates. At the same time, ASU welcomed its largest-ever freshman class; the nearly 13,000 enrollments represented a 12 percent increase from fall 2017. More than 36,000 students are enrolled in ASU Online courses. Total enrollment at Arizona State surpassed 100,000 in 2018, reaching 103,530 for the fall 2018 semester.