The University of California, Irvine (UCI or UC Irvine) is a public land-grant research university in Irvine, California, United States. One of the ten campuses of the University of California system, UCI offers 87 undergraduate degrees and 129 graduate and professional degrees, and roughly 30,000 undergraduates and 7,000 graduate students were enrolled at UCI as of Fall 2024. The university is classified among "R1: Doctoral Universities – Very high research activity" and had $609.6 million in research and development expenditures in 2023, ranking it 56th nationally. UCI became a member of the Association of American Universities in 1996. The university administers the UC Irvine Medical Center, a large teaching hospital in Orange, and its affiliated health sciences system; the University of California, Irvine, Arboretum; and a portion of the University of California Natural Reserve System.