Teamsters Union

Teamsters Union, in full, International Brotherhood of Teamsters, Chauffeurs, Warehousemen, and Helpers of America, United States trade union, one of the largest in the world, founded in 1903. Currently the membership consists of about 1.7 million people working in such diversified fields as transport, warehousing, health care, office management, and construction, as well as many workers in the bakery, dairy, brewery, and food-processing industries.

Since the 1950s, the union has repeatedly been investigated for corrupt practices, and several of its presidents have been imprisoned on criminal charges. The union was expelled from the AFL-CIO in 1957, but was allowed to rejoin in 1987. Headquarters is in Washington, D.C.