US unions not yet classified edit
- Hotel Employees and Restaurant Employees Union see UNITE HERE below
- International Association of Heat and Frost Insulators and Asbestos Workers (www.insulators.org)
- International Association of Machinists and Aerospace Workers IAM (www.iamaw.org)
- International Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers and Helpers (www.boilermakers.org)
- International Brotherhood of Electrical Workers IBEW (www.ibew.org)
- International Federation of Professional and Technical Engineers IFPTE (www.ifpte.org)
- International Plate Printers, Die Stampers and Engravers Union of North America
- International Union of Allied Novelty and Production Workers
- International Union of Elevator Constructors IUEC (www.iuec.org)
- International Union of Journeymen Horseshoers and Allied Trades IUJHAT
- International Union of Operating Engineers IUOE (www.iuoe.org)
- International Union of Painters and Allied Trades IUPAT (www.iupat.org)
- National Federation of Independent Unions NFIU (www.nfiu.org)
- Marine Engineers Beneficial Association MEBA (www.d1meba.org)
- National Association of Letter Carriers NALC (www.nalc.org)
- Office and Professional Employees International Union OPEIU (www.opeiu.org)
- Operative Plasterers' and Cement Masons' International Association OPCMIA (www.opcmai.org)
- Paper, Allied-Industrial, Chemical & Energy Workers International Union PACE (www.paceunion.org)
- Sheet Metal Workers International Association SMWIA (www.smwia.org)
- Hotel Employees and Restaurant Employees Union HERE
- United Association of Journeymen and Apprentices of the Plumbing, Pipefitting and Sprinkler Fitting Industry of the United States and Canada UA (ua.org)
- United Automobile, Aerospace & Agricultural Implement Workers of America International Union UAW (www.uaw.org
- United Steelworkers of America USWA (www.uswa.org)
- United Union of Roofers, Waterproofers and Allied Workers (www.unionroofers.com)
- Utility Workers Union of America UWUA (www.uwua.org)