IIAC

IIAC may refer to:

Sports

 * Interstate Intercollegiate Athletic Conference, a now-defunct college athletics conference, formerly Illinois Intercollegiate Athletic Conference
 * Iowa Intercollegiate Athletic Conference, the former name of a college athletics conference now known as the American Rivers Conference

Other uses

 * Incheon International Airport Corporation, a corporation which operates Incheon International Airport (Airport of Republic of Korea)


 * Institut Interdisciplinaire d'Anthropologie du Contemporain, a French research institute