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

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As of fall 2019, 30,736 students were enrolled, 22,791 at the Flagstaff campus.The average cost of tuition and fees for a full-time, Arizona resident undergraduate student for two semesters is $11,896,[10] and out-of-state undergraduates pay an estimated $26,516. NAU also participates in the Western Undergraduate Exchange Program, which offers lower tuition rates for students from the Western United States. For 2018–19, WUE tuition and fees are $16,759. NAU offers Flagstaff undergraduate students the Pledge Program, which guarantees the same tuition rate for four years.