AIU

AIU may refer to:
 * Akita International University, an English-language public university in Akita, Japan
 * AlAlamein International University, a national University in New Alamein, Egypt
 * Allegheny Intermediate Unit, a branch of the Pennsylvania Department of Education
 * Alliance Israélite Universelle, a Jewish educational and civil rights organization based in Paris
 * Alliant International University, an American for-profit university based in San Diego, California
 * American Idol Underground, former name of Artist Underground
 * American InterContinental University, an American for-profit university
 * American Industrial Union, a short-lived labor organization established in 1895
 * American International Underwriters, former name of AIU Holdings, a subsidiary of American International Group
 * American International University (disambiguation), several universities around the world
 * Approximately Infinite Universe, a double album by Yoko Ono
 * Association of Indian Universities, association of major universities in India
 * Atlantic International University, a distance-learning university based in Hawaii
 * Athletics Integrity Unit, a body founded by the International Association of Athletics Federations to combat doping in athletics