National Labor Organizations

Information about National Labor Organizations whose members total 100,000 or more.
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Organizations with Membership Over 100,000

Members Union1 2,731,419 National Education Associationof the United States2 1,505,100 Service Employees International Union3 1,459,511 American Federation of State, County, and Municipal Employees 1,396,174 International Brotherhood ofTeamsters3 1,311,548 United Food and Commercial Workers International Union 828,512 American Federation of Teachers 754,978 United Steelworkers of America 704,794 International Brotherhood of Electrical Workers 669,772 Laborers' International Union of North America 653,781 International Association of Machinists and Aerospace Workers 557,099 International Union, United Automobile, Aerospace, and Agricultural Implement Workers of America 545,638 Communications Workers of America 522,416 United Brotherhood of Carpenters and Joiners of America2 455,346 Union of Needletrades, Industrial, and Textile Employees 424,579 Longshore and Warehouse Union 392,584 International Union of Operating Engineers 361,362 Maritime Trades 324,043 United Association of Journeymen and Apprentices of the Plumbing and Pipe-Fitting Industry of the U.S. and Canada 292,221 National Association of Letter Carriers 286,700 American Postal Workers Union 271,463 International Association of Fire Fighters 269,204 National Postal Mail Handlers Union 245,011 Paper, Allied-Industrial, and Chemical International Union 226,975 American Federation of Government Employees 180,598 Amalgamated Transit Union 152,294 American Nurses Association2 148,806 Sheet Metal Workers International Association 127,278 International Brotherhood of Painters and Allied Trades 125,437 International Association of Bridge, Structural, Ornamental, and Reinforcing Iron Workers 125,398 Transport Workers Union of America 125,000 Building and Construction Trades 111,851 American Association of Classified School Employees2 105,460 The National Rural Letter Carriers' Association2
1. Unless otherwise noted, unions are AFL-CIO affiliated.
2. Not AFL-CIO affiliated.
3. Severed ties with the AFL-CIO in July 2005.
Source: U.S. Department of Labor.
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