The leading online university in the United States. Established in 1976 to answer the unique needs of working adults and their employers, University of Phoenix is the largest private accredited university in the United States. With more than 17,000 highly qualified instructors, 139 campuses, and Internet delivery worldwide, we help more than 180,000 working professionals achieve a higher level of success every year. University of Phoenix is accredited by the Higher Learning Commission and is a member of the North Central Association.