United Steelworkers (USW) is one of the largest labor unions in North America. It is affiliated with the American Federation of Labor and Congress of Industrial Organizations (AFL-CIO) and the Canadian Labour Congress (CLC). The USW has headquarters in Pittsburgh. Its members work mainly in the steel, aluminum, paper, forestry products, tire and rubber, mining, glass, chemical, and petroleum industries. The union also includes people working in transportation, trades, and services. The union’s official name is the United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union. For the membership of the USW, see Labor movement (table) .
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The union was formed in 2005 when the United Steelworkers of America (USWA) merged with the Paper, Allied-Industrial, Chemical and Energy Workers International Union (PACE). The USWA was founded in 1936 and adopted the USWA name in 1942. PACE was formed in 1999, when the United Paperworkers International Union merged with the Oil, Chemical, and Atomic Workers. In 2008, the full union formed an alliance with the largest union in the United Kingdom and Ireland, Unite the Union, to form Workers Uniting, a global union. Workers Uniting represents workers in the steel, paper, oil, health care, and transportation industries.
