IASA

IASA may refer to:


 * The Iranian American Sport & Culture Association, a Los Angeles-based sports diplomacy nonprofit organization
 * The IETF Administrative Support Activity, an activity housed within the Internet Society (ISOC)
 * The Improving America's Schools Act of 1994
 * The International Association of Scientologists Administrations
 * The International Association of Sound and Audiovisual Archives
 * The International Aviation Safety Assessment Program of the US FAA
 * The Irish Amateur Swimming Association
 * The Israel Arts and Science Academy, Jerusalem, Israel
 * Institución Atlética Sud América, football club from Montevideo in Uruguay