Alphabetically Union List - A
- A&N Foods Labour Union
- A&N Middle Management Workers Union
- AAL Labour Union of Thailand
- Abano Printing Labour Union
- Able Industries Labour Union
- Accessory Consolidation Workers Union
- Acue Main Brush Labour Union
- Acusnet Labour Union
- Adder Trans Thai Labour Union
- Adidas Labour Union
- ADR Labour Union
- Agricultural Products Workers Union
- Air Craft Container Employees Union
- Aircon Parts Labour Union of Thailand
- Airconditioner Manufacturer Labor Union of Thailand
- Airport of Thailand Pubic Company Limied State Enterprise Workers' Union
- Alcanic Siam Aluminum Labour Union
- All Stars Tour Thailand Labour Union
- Almond Labour Union
- Alpha Labour Union
- Alpha Spinning Labour Union
- Aluminuj and Metal Labour Union
- Aluminum and Metal Producs Workers Union (Sriracha)
- Aluminum and Metal Products Workers Union
- Aluminum Products Workers Union of Thailad
- Amakasaki Pine Labour Union
- Amalion Labour Union
- Amalion Supervisory Labour Union
- Amcor of Thailand Labour Union
- America NA Bank Workers Union
- Amin Buri Resort Phuket Labour Union
- Ampass Labour Union of Thailand
- Ampass Supervisory Labour Union of Thailand
- Ana Tour Thailand Labour Union
- Anan Labour Union
- ANB Lab and Pharma Labour Union
- Ancell Labour Union of Thailand
- Angwieng Sugar Workers Union
- Animal Bone Industry Labour Union
- Anoma Labour Union
- AP National SalesLabour Union
- Apapim Labour Union
- Apex Labour Union
- Apiko Amta Labour Union
- Apiko Hitech Labour Union
- Apple Film Labour Union
- Apply DB Thaialnd Labour Union
- Aree Store Labour Union
- Armstrong Labour Union of Thailand
- Art Top International Workers Union
- Artificial Flower Producer Workers Union
- Asahi Labou Union
- Asahi Thai Alloy Labour Union
- Asakawa Thailand Labour Union
- Asan Service Labour Union
- Ascot Labour Union
- Asia Bank Workers Union
- Asia Cement Labour Union
- Asia Cement Supervisory Labour Union
- Asia Garment Labour Union
- Asia Garment Labour Union
- Asia Metallergy Labour Union
- Asia Pattaya Hotel Workers Union
- Asia Service Labour Union
- Asia Tour Thailand Labour Union
- Asian Institute of Technology Workers Union
- Asno Horie Labour Union
- Asoke Thailand Labour Union
- Asset Transport Workers Union
- Associate Labour Union
- AT&T Labour Union
- Atec Computer Manufacturing Labour Union
- Atlantic Labour Union
- ATSUMITEC THAILAND WORKERS' UNION
- Auto Accessories and Parts Workers Union
- Auto Accessories Workers Union of Thailand
- Auto Industry Labour Union
- Auto Parts Makers Workers Union
- Auto Parts Manufacturing Workers Unio of Thailand
- Auto Wheel Rubber Songkhla Workers Union
- Automobile Accessories Producer Labour Union
- Automobile and Parts Isuzu Thailand Workers Union
- Autoparts Manufacturer Labor Union of Thailand
- Autosubcontract Workers Union of Thailand
- Awaji Thailand Labour Union
- Ayinomoto Thailand Labour Union
