<P> This is a list of labor unions in the United States . Unions exist to represent the interests of workers, who labor Relations Act 1935)) is the primary statute which gives US unions rights . The rights of members are governed by the Labor Management Reporting and Disclosure Act 1959 . List Below </P> <Table> <Tr> <Th> Name </Th> <Th> est . </Th> <Th> Members (approx) </Th> <Th> Description </Th> <Th> Constitution </Th> <Th> Website </Th> </Tr> <Tr> <Td> National Education Association of the United States </Td> <Td> 1857 </Td> <Td> 2,731,419 </Td> <Td> Public school employees including but not limited to teachers, Education Support Professionals, cafeteria workers, bus drivers, guidance counselors, nurses, administrative assistants, secretaries, psychologists, and librarians . </Td> <Td> 2013 </Td> <Td> NEA </Td> </Tr> <Tr> <Td> Service Employees International Union </Td> <Td> 1921 </Td> <Td> 1,901,161 </Td> <Td> Hotel, restaurant, and hospitality workers; RNs, professional, technical and non-professional health care workers; public employees . </Td> <Td> 2012 </Td> <Td> SEIU </Td> </Tr> <Tr> <Td> American Federation of State, County, and Municipal Employees </Td> <Td> 1932 </Td> <Td> 1,459,511 </Td> <Td> Employees of state, county, and municipal governments . </Td> <Td> 2012 </Td> <Td> AFSCME </Td> </Tr> <Tr> <Td> Teamsters </Td> <Td> 1903 </Td> <Td> 1,400,000 </Td> <Td> Full name: International Brotherhood of Teamsters . Truck drivers; warehouse workers; miscellaneous trades . </Td> <Td> 2011 </Td> <Td> teamster.org Teamsters </Td> </Tr> <Tr> <Td> United Food and Commercial Workers </Td> <Td> 1979 </Td> <Td> 1,300,000 </Td> <Td> Retail store and distribution employees . </Td> <Td> 2008 </Td> <Td> </Td> </Tr> <Tr> <Td> American Federation of Teachers </Td> <Td> 1916 </Td> <Td> 828,512 </Td> <Td> Public school teachers, RNs, professional, technical and non-professional health care workers . </Td> <Td> </Td> <Td> AFT </Td> </Tr> <Tr> <Td> United Steelworkers </Td> <Td> 1942 </Td> <Td> 860,264 </Td> <Td> Steel mill workers; related trades . </Td> <Td> </Td> <Td> USW </Td> </Tr> <Tr> <Td> International Brotherhood of Electrical Workers </Td> <Td> 1891 </Td> <Td> 704,794 </Td> <Td> Electrical manufacturing workers; electric utility workers . </Td> <Td> 2012 </Td> <Td> IBEW </Td> </Tr> <Tr> <Td> Laborers' International Union of North America </Td> <Td> 1903 </Td> <Td> 669,772 </Td> <Td> Miscellaneous construction workers; other trades . </Td> <Td> </Td> <Td> LIUNA </Td> </Tr> <Tr> <Td> International Association of Machinists and Aerospace Workers </Td> <Td> 1888 </Td> <Td> 653,781 </Td> <Td> Aircraft manufacturing workers; aircraft maintenance and repair workers . </Td> <Td> 2008 </Td> <Td> IAM </Td> </Tr> <Tr> <Td> United Auto Workers </Td> <Td> 1935 </Td> <Td> 990,000 </Td> <Td> Full name: International Union, United Automobile, Aerospace, and Agricultural Implement Workers of America . Automobile, truck, farm equipment, and construction equipment manufacturing workers . </Td> <Td> </Td> <Td> UAW </Td> </Tr> <Tr> <Td> Communications Workers of America </Td> <Td> 1947 </Td> <Td> 545,638 </Td> <Td> Telecommunication, customer service, broadcasting, public sector, healthcare and other workers . </Td> <Td> 2013 </Td> <Td> CWA </Td> </Tr> <Tr> <Td> United Brotherhood of Carpenters and Joiners of America </Td> <Td> 1881 </Td> <Td> 522,416 </Td> <Td> Building industry carpenters . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> UNITE HERE </Td> <Td> </Td> <Td> 270,000 </Td> <Td> Formerly UNITE (Union of Needletrades, Industrial and Textile Employees; 1995 merger of ILGWU and ACTWU; in 2004 merged with HERE). Textile and garment manufacturing workers; hotel and restaurant workers . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> International Longshore and Warehouse Union </Td> <Td> 1937 </Td> <Td> 424,579 </Td> <Td> Freight handlers at ports . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> International Union of Operating Engineers </Td> <Td> 1896 </Td> <Td> 392,584 </Td> <Td> Operators of construction equipment; stationary engineers . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> United Association </Td> <Td> 1889 </Td> <Td> 324,043 </Td> <Td> Full name: United Association of Journeymen and Apprentices of the Plumbing, Pipefitting and Sprinkler Fitting Industry of the United States and Canada . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> National Association of Letter Carriers </Td> <Td> 1889 </Td> <Td> 292,221 </Td> <Td> United States Postal Service mail delivery workers in urban areas . </Td> <Td> 2014 </Td> <Td> NALC </Td> </Tr> <Tr> <Td> American Postal Workers Union </Td> <Td> 1971 </Td> <Td> 286,700 </Td> <Td> United States Postal Service workers other than letter carriers . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> International Association of Fire Fighters </Td> <Td> 1918 </Td> <Td> 271,463 </Td> <Td> Municipal fire fighters and paramedics . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> National Postal Mail Handlers Union </Td> <Td> </Td> <Td> 269,204 </Td> <Td> A division of LIUNA . United States Postal Service workers other than letter carriers . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> American Federation of Government Employees </Td> <Td> 1932 </Td> <Td> 289,023 </Td> <Td> Miscellaneous U.S. federal government workers . </Td> <Td> 2012 </Td> <Td> AFGE </Td> </Tr> <Tr> <Td> Amalgamated Transit Union </Td> <Td> 1892 </Td> <Td> 190,000 </Td> <Td> Mass transit service workers . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> American Nurses Association </Td> <Td> 1897 </Td> <Td> 152,294 </Td> <Td> Professional association for registered nurses . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Sheet Metal Workers International Association </Td> <Td> 1888 </Td> <Td> 148,806 </Td> <Td> Mainly construction - industry sheet metal workers; also shipbuilders . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> International Union of Painters and Allied Trades </Td> <Td> 1887 </Td> <Td> 127,278 </Td> <Td> Construction - industry painters . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> International Association of Bridge, Structural, Ornamental, and Reinforcing Iron Workers </Td> <Td> 1896 </Td> <Td> 125,437 </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Transport Workers Union of America </Td> <Td> 1934 </Td> <Td> 125,398 </Td> <Td> Mass transit, railroad, and airline workers . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> International Alliance of Theatrical Stage Employees </Td> <Td> 1893 </Td> <Td> 122,000 </Td> <Td> Entertainment: Theater, Motion Picture & Television, Trade Shows </Td> <Td> </Td> <Td> IATSE </Td> </Tr> <Tr> <Td> American Association of Classified School Employees </Td> <Td> </Td> <Td> 111,851 </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> National Rural Letter Carriers' Association </Td> <Td> 1903 </Td> <Td> 104,717 </Td> <Td> United States Postal Service mail delivery workers in rural areas . </Td> <Td> </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Name </Th> <Th> est . </Th> <Th> Members (approx) </Th> <Th> Description </Th> <Th> Constitution </Th> <Th> Website </Th> </Tr>

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