Alphabetically Union List - D
- Dabu Bejus Workers Union of Thailand
- Dai Nippon Printing Ink Workers Union
- Daichin Group Workers Union
- Daido Thailand Workers\' Union
- Daikin Amata Rakseree Workers Union
- Daikin Compressor Supervisor Workers\' Union
- Dairy Framing Promotion Organization of Thailand
- Daiva Workers Union
- Dance Man Workers Union
- Danieli Relation Ship Workers'Union
- DD All Wood Workers Union
- DDK Workers Union
- Deesawat Labour Union
- Delpine Workers Union
- Delta Electronic Thailand Workers Union
- Democracy Workers Union
- Denborah Services Thailand Labour Union
- Denca Workers Union
- Denso Executive Labor Union of Thailand
- Denso Thailand Workers Union
- Dextra Workers Union
- Diaglass Workers Union
- Diamon Cliff Phuket Workers Union
- Diamond Burnish Workers Union of Thailand
- DK Workers Union of Thailand
- Dominium Toys Workers Union
- Double Star Industry Workers Union
- Dragon Handbag Thailand Workers Union
- Dragon Handbag Workers Union
- Dragon Thai Workers Union
- Drakon Connection Labour Union
- Dream maker Worker Union
- DSK 1997 Workers Union
- Dusit Lagoona Phuket Workers Union
- DYNAMETAL WORKER'S UNION
