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