As of 2003 these were all of the unions in the US with over
100,000 members in order from the largest; NEA - National Education
Association - 2,679,396 SEIU - Service Employees International
Union - 1,464,007 UFCW - United Food & Commercial Workers -
1,380,507 IBT - International Brotherhood of Teamsters 1,350,000
AFSCME - American Federation of State, County & Municipal
Employees - 1,350,000 LIUNA - Laborers' International Union of
North America 840,180 AFT - American Federation of Teachers 770,090
IBEW - International Brotherhood of Electrical Workers 700,548 IAM
- International Association of Machinists and Aerospace Workers
673,095 UAW - United Automobile, Aerospace and Agricultural
Implement Workers of America 638,722 CWA - Communications Workers
of America 557,136 USWA - United Steelworkers of America 532,234
UBC - United Brotherhood of Carpenters and Joiners of America
531,839 IUOE - International Union of Operating Engineers 390,388
NPMHU - National Postal Mailhandlers Union 388,480 UA - United
Association of the Journeymen and Apprentices of the Plumbing and
Pipe Fitting Industry of the United States and Canada 325,914 NALC
- National Association of Letter Carriers 294,315 APWU - American
Postal Workers Union 292,901 PACE - Papter, Allied-Industrial,
Chemical and Engineering Workers International Union 274,464 IAFF -
International Association of Fire Fighers 261,551 HERE - Hotel
Employees and Restaurant Employees International Union 249,151
UNITE - Union of Needletrades, Industrial and Textile Employees
209,876 AFGE - American Federation of Government Employees 200,600
AGVA - American Guild of Variety Artists 182,597 UAN - United
American Nurses 152,000 OPEIU - Office and Professional Employees
International Union 150,882 SMW - Sheet Metal Workers International
Association 148,378 BSORIW - International Association of Bridge,
Structural, Ornamental and Reinforcing Iron Workers 130,928 IUPAT -
International Union of Painters and Allied Trades 115,511 BCTGM -
Bakery, Confectionery, Tobacco Workers and Grain Millers
International Union 114,618 TWU - Transportation Workers Union of
America 110,000 AACSE - American Association of Classified School
Employees 109,188 IATSE - International Alliance of Theatrical
Stage Employees, Moving Picture Technicians, Artists and Allied
Crafts of the United States and Canada 104,102 AFM - American
Federation of Musicians of the United States and Canada 102,000
NRLCA - National Rural Letter Carriers' Association 101,810 BAC -
International Union of Bricklayers and Allied Craftworkers 101,499
TCU - Transportation Communications International Union 101,228
UMWA - United Mineworkers of America 100,570