Alphabetically Union List - H
- Habiro Labour Union of Thailand
- Hadyai Auto Garage Labour Union
- Hahabishi Labour Union
- Hanabishi Supervisory Labour Union
- Harvey Labour Union
- Hatek Seng Textile Labour Union
- Havaii-Thai Export Labour Union
- Hayakawa Labour Union
- Helmet Labour Union of Thailand
- Her Thai Labour Union
- Her-e Labour Union
- Hielberg Graphic Labour Union
- High Technitsu (Thailand) Labour Union
- High Textile Labour Union
- Hin Lek Fai Labour Union of Thailand
- Hino Mortor Sells (Thailand) Labour Union
- Hino Thailand Labour Union
- Hirosemsu (Thailand) Labour Union
- Hitachi Compressure Labour Union
- Hitachi Labour Union
- Hitachi Labour Union of Thaialnd
- Hitachi Transport Labour Union
- HJC Labour Union
- Hochin Labour Union
- Hoe Producers Labour Union of Thailand
- Holiday Inn Crown Plaza Hotel Workers Union
- Holiday Inn Resort Phuket Labour Union
- Honda Affiliation Thailand Workers Union
- Honda Labour Union of Thailand
- Honda Lock Thai Labour Union
- Hong Kong and Shienghei Bank Supervisory Labour Union
- Hongkong and Shianghai Bank Workers Union
- Hotel and Services Workers Union
- Hotel Enterprise Workers Union
- Hotel Samphan Workers Union
- HR Silver Labour Union
- Huafong Rubber Thiland Labour Union
- Huawei Technology (Thailand) Labour Union
