IAD or Iad may stand for:
Organisations and businesses AirAsia India, ICAO airline code IAD Internal affairs (law enforcement), or Internal Affairs Division (IAD), the police agency division that investigates possible misconduct Inter-American Dialogue, or IAD, a non-profit organization in Washington, D.C. International Automotive Design, or IAD, a British car manufacturer Iraqi Army Division, or IAD
Places, airport codes Iad (river), a tributary of the Crișul Repede in Bihor County, Romania Iad, a tributary of the Bistrița (Someș) in Bistrița-Năsăud County, Romania Livezile, Bistrița-Năsăud, Romania, Livezile Commune was formerly called Iad Washington Dulles International Airport, IATA airport code IAD
Technology iAd, a mobile advertising service operated by Apple Inc. Integrated access device, or IAD Intelligent Assist Device (robotics), or IAD Internet addiction disorder, or IAD
Other uses Institutional analysis and development framework, or IAD, a systematic method in policy analysis Instructor-assisted deployment, or IAD, a parachute deployment method for student skydivers Interaction design, or IAD International Air Distress, or IAD, a radio frequency Intramolecular aglycon delivery, or IAD, a stereospecific glycosylation technique in organic carbohydrate chemistry International Asexuality Day, or IAD, a day of celebration for asexual people