AAIA

AAIA may refer to:


 * Aden-Abyan Islamic Army, Islamist group, Yemen
 * Air Accident Investigation Authority, a Hong Kong government agency
 * Associate of the Association of International Accountants, see Association of International Accountants
 * Association on American Indian Affairs
 * Australian Archaeological Institute at Athens, foreign archaeological institute in Greece
 * Automotive Aftermarket Industry Association, former name of the Auto Care Association
 * Australian Adult Industry Awards Australian pornography award since 2001