IWA

IWA may refer to:

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• Independent Wrestling Association Mid-South
• Indian Workers' Association
• Industrial, Wood and Allied Workers of Canada (IWA Canada), an autonomous branch of the former International Woodworkers of America trade union (IWA)
• Inland Waterways Association
• Institute of Welsh Affairs, a Welsh think-tank
• Integrated Windows Authentication
• International Water Association
• International Webcasting Association
• International Webmasters Association
• International Woodworkers of America
• International Workers Association is an anarcho-syndicalist federation of labour unions
• International Workshop Agreement, a stage of standardization process used by International Organization for Standardization
• International Workingmen's Association (1864-1876), also known as the First International
• International Wrestling Alliance
• International Wrestling Association (disambiguation)
• International Wrestling Association of Japan
• Irish Wheelchair Association
• Phoenix-Mesa Gateway Airport (FAA airport code: IWA) in Mesa, Arizona
• Iwa, the great frigatebird, a migratory seabird in the Northwestern Hawaiian Islands
• IWA and OUTDOORCLASSICS – Internationale Waffen Ausstellung (International Weapons Exhibition) - an exhibition taking place every year in Nuremberg/Germany