International Workers' Association may refer to:
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International Workingmen's Association
The International Workingmen's Association (IWA; 1864–1876), often called the First International, was a political international which aimed at uniting a variety of different left-wing socialist, social democratic, communist, and anarchist g ...
, the First International, an international organization of left-wing groups and trade unions, active 1864–1876
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International Workers' Association – ''Asociación Internacional de los Trabajadores'' (IWA–AIT), an international federation of anarcho-syndicalist trade unions, founded in 1922
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