United Steelworkers of America

Steelworkers of America, United (USWA), large U.S. labor union affiliated with the American Federation of Labor and Congress of Industrial Organizations (AFL-CIO) and consisting mainly of workers in the steel, iron, metal, aluminum, and chemical industries. Founded in 1936, the USWA has since merged with 4 other unions. It has its headquarters in Pittsburgh, Pa., with local chapters throughout the United States and Canada.

See also: Labor movement.