Northern Arizona University (NAU) is a public university located in Flagstaff, Arizona, United States. It is accredited by the North Central Association of Colleges and Schools, and has 36 satellite campuses in the state of Arizona. The university offers both undergraduate and graduate degrees.As of fall 2014, 27,715 students were enrolled, 20,134 at the Flagstaff campus. The average cost of tuition and fees for a full-time, Arizona resident undergraduate student for two semesters is $10,346.