IWA

IWA may refer to:

International

 * Institute of World Affairs
 * International Water Association
 * International Webmasters Association
 * International Woodworkers of America, United States and Canada
 * International Workers Association, an anarcho-syndicalist federation of labour unions
 * International Workingmen's Association (1864–1876), also known as the First International

United Kingdom

 * Indian Workers' Association
 * Inland Waterways Association, a canal charity
 * Institute of Welsh Affairs, a policy think-tank

Elsewhere

 * Independent Wrestling Association Mid-South, United States
 * International Wrestling Alliance, Canada
 * International Wrestling Association (disambiguation), various national bodies
 * Irish Wheelchair Association, Ireland

Places

 * Iwa, Nepal, a defunct municipality (village development committee)
 * Phoenix-Mesa Gateway Airport, Mesa, Arizona, US (FAA code: IWA)

Other uses

 * Great frigatebird ('iwa), an avian species
 * Hurricane Iwa, a late-1982 storm on the Hawaiian Islands
 * IWA OutdoorClassics, an arms trade show held annually in Nuremberg, Germany
 * Integrated Windows Authentication, Microsoft term for a set of protocols
 * International Workshop Agreement, a stage of ISO's standardization process