Provincially Union List - Chachengsao
- Thai Tabuchi Connection Labour Union
- Siam Tricord Samphan Labour Union
- Thai Kodama Plastic Workers Union
- TTA Samphan Workers Union
- Osaka Labour Union
- Sunny Workers Union
- Master Toys Workers Union
- Sunden Workers Union
- Automobile Accessories Producer Labour Union
- Saha Viriya Samphan Labour Union
- Siam Sharp Labour Union
- SVI Elastomer Labour Union
- Welt Draft Worekrs Union
- Panasonic Thailand Worker
- Paed Rieu Eggs Workers Union
- YS Phan Workers Union
- THAILAND AUTO PART AND METAL WORKER'S UNION
- Thai Auto Wheels Workers Union
- Bangkok Alloy Enterprise Cha Cherng Sao Workers Union
- Bangkok Alloy Enterprise Workers Union of Thailand
- THAIZON GROUP LABOUR UNION
- Liquor Distilley Enterprise Workers Union
- DYNAMETAL WORKER'S UNION
- JTEKT WORKERS UNION OF THAILAND
- Echo Autoparts Connection Labour Union
