The University of Arizona (Arizona, U of A, UArizona, or UA) is a public research university in Tucson, Arizona. Founded in 1885, the UofA was the first university in the Arizona Territory. As of 2019, the university enrolled 45,000 students in 19 separate colleges.

Northern Arizona University (NAU) is a public research university with its main campus in Flagstaff, Arizona. Accredited by the Higher Learning Commission, the university offers 158 baccalaureate and graduate degree programs.

Arizona State University is a public metropolitan research university on five 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.