Alphabetically Union List - S
- S K B Connection Labour Union
- S Supplies Labour Union
- S&CC Labur Union
- S&C Labour Union
- Sa Siam Steel Garage Labour Union
- Saeng Charoen Foundry Labour Union
- Saeng Ngam Industrial Worker
- Saeng Tawn Labour Union
- Saeng Thai Mult Dream Labour Union
- Safety Belt Supervisory Labour Union
- Safety Belts and Bags Workers Union
- Saha Mala Yan Bank Workers Union
- Saha Mosake Sara Buri Labour Union
- Saha Thai Ava Labour Union of Thailand
- Saha Thai Engine Partition Labour Union
- Saha Thai Soap Labour Union
- Saha Viriya Nittan Labour Union
- Saha Viriya Samphan Labour Union
- Sahachon Labour Union
- Sahakij Wisal Labour Union
- Sahamit Bleash and Dye Labour Union
- Saint-Gobain Sekurit Workers
- Sakon Iron Maker Labour Union
- Sambo Shindo Labour Union
- Samphan York Organization Labour Union
- Samut Prakarn Food Industry Labour Union
- Sandy Workers Union
- Sanity and Ceramics Products Producer Labour Union of Thailand
- Sanko Gosei Thailand Workers
- Santi Textile Labour Union
- Sanyo Union of Thailand
- Sanyo Thailand Workers Union
- Sapphire Workers Union
- Sarawut Garment Labour Union
- Sarawut Transport and Supplies Labour Union
- SAS Labour Union
- SC Carier Labour Union
- SC Service Laobur Union
- SCG Labour Union
- SCH Labour Union
- Schneider Labour Union
- Schneider Workers Union
- SCI Electric Labour Union
- Screw and Bolt Maker Workers Union
- Sea Transportation Thailand Workers Union
- Seafood Products Workers Union
- Security Business Workers Union
- SEI International Labour Union
- Seikoi Navanakhon Workers Union
- Seikoi Workers Union
- Seneka Agriculture Workers Union
- Sengthai Brassware Thailand Wokers Union
- Sentago Frozen Chicken Thailand Labour Union
- Sermsuk Labour Union
- Sermsuk Thaialnd Supervisory Labour Union
- Serve and Safe Workers Union
- SGS (Thailand) Labour Union
- Shangrila Hotel Workers Union
- Shell Thailand Workers Union
- Sheraton Grand Lagoona Phuket Workers Union
- Sheraton Grand Sukumvit Workers Union
- Shevalle Workers Union
- SHIN-EI HIGHTECH WORKER UNION
- Shinanokenshi (Thailand) Supervisory Labour Union
- Shipping Transportation Workers Union
- Shongchai Worker
- SHOWA AUTOPARTS WORKER'S UNION THAILAND
- Siam Art Flowers Labour Union
- Siam Battery Labour Union
- Siam Brothers Worker
- Siam Cement Construction Materials Workes Union
- Siam Chemical Industry Labour Union
- Siam City Bank Workers Union
- Siam City Brassware Labour Union
- Siam City cement labour union
- Siam Commercial Bank Supervisory Labour Union
- Siam Commercial Bank Workers Union
- Siam Commercial Integrated and Affilates Workers Union
- Siam Container Labour Union
- Siam Electric Industries Labour Union
- Siam Electric Labour Union
- Siam Fiber Textile Labour Union
- Siam Foods Labur Union
- Siam Foods Supervisory Union
- Siam Goshi Worker's Union
- Siam IKK Labour Union
- Siam Integrated Service Labour Union
- Siam Inter Labour Union
- Siam Intercontinental Workers Union
- Siam Iron Labour Union
- Siam Iron Service Workers Union
- Siam Kretting Labour Union
- Siam Maritime Transport Labour Union
- Siam Metal Supervisory Labour Union
- Siam Metal Workers Union
- Siam Moldbase Labour Union
- Siam Multi Service Labour Union of Thailand
- Siam Nippon Steel pipe Worker\'s Union
- Siam Nissan Labour Union
- Siam Pacific Labour Union
- Siam Parts and Engineering Labour Union
- Siam Parts Labour Union of Thailand
- Siam Realty and Service Labour Union
- Siam RI Labour Union
- Siam Ricken Labour Union
- Siam Saxon Labour Union
- Siam Sharp Labour Union
- Siam Shorside Service Labour Union
- Siam Shorside Transport Labour Union of Thailand
- Siam Sintose Labour Union
- Siam Snack Labour Union
- Siam Steel Workers Union
- Siam Sun Enterprise Labour Union of Thailand
- Siam Technical Handicraft Workers Union
- Siam Thani Furniture Labour Union
- Siam Toyota Labour Union
- Siam Tricord Samphan Labour Union
- Siam Vala Labour Union
- Siam VMC Labour Union
- Siam VMC Workers Union
- Siam Wire Industry Workers Union
- Siamount Plastic Workers Union
- Sida Manufacturing Labour Union
- SIG Labour Union
- Siix Circuit Board Worker
- SIK Labour Union of Thailand
- SIK Supervisory Labour Union
- Silpa Udom Industry Workers Union
- Silver Ice Workers Union
- Sin Thai Labour Union
- Sin Thani Labour Union
- Singha Beer Workers Union
- Sino-Thai Workers Union
- Sinthanee Workers Union
- SK Pattana Labour Union
- SKB Creative Labour Union
- Skip Service Workers Union
- SKM Engineering Labour Union
- SLC Thailand Labour Union
- SME Banking of Thailand Trade Union
- SMT Rent a Car Phuket Labour Union
- SMTC Labour Union
- Snaky Thai Workers Union
- Sola Lens Workers Union
- Solex Supervisory Labour Union
- Solex Workers Union
- Solidarity Center Workers
- Somboonsomic Workers Union
- Song Nsam Sarment Labour Union
- Songkhla Concrete Workers Union
- Songserm Sunden Workers Union
- Songserm Thai Textile Workers Union
- Songserm Transport Workers Union
- Sonodo Workers Union
- Soongnern Sag Weaving Factory Workers Union
- Sopisai Garment Workers Union
- SP Labour Union
- SP Samphan Labour Union
- Speed Internationnal Air Freight Union
- Spinning and Weaving Workers Union
- Sport Authority of thailand State Enterprise Workers Union
- Sports Club Workers Union
- Spring Industrial Workers Union
- SR Texture Labour Union
- Sri Sam-ang Workers Union
- Sri Thai Food and Beberage Workers Union
- Sri Thai Food Products Workers Union
- Sri Thai Kitchen Utensils Workers Union
- Sri Thai Superware Workers Union
- Sri Thai Workers Union
- Srisaket Garment Workers Union
- Srithep Thai Workers Union
- Srithong Electronchemical Workers Union
- ST Express Labour Union
- Standard Products Workers Union
- Standards Chartered Nakhondhon Bank Workers Union
- Stanley Thailand Workers Union
- Star Print Workers Union
- State Enterprise Labour Union Forest industry Organization of Thailand
- Stationary Enterprise Workers Union
- Steel Pipe Workers Union
- STP Rubber Labour Union
- Suanluang Plastic Labour Union
- Subcontracted Enterprise Workers Union
- Sue Saeng Industry Labour Union
- Sukoson Masda Auto Industry Labour Union
- Suksawas Kollakarn Labour Union
- Summit Advance Workers Union
- Summit Affiliation Thailand Workers Union
- Summit and Sheeting Workers Union
- Summit Auto Body Industry Workers Union
- Summit Chukoku Seira Labour Union
- Summit Engineering Workers Union
- Summit Frozen Workers Union
- Summit Fujikiko worker's union
- Summit Samphan Workers Union
- Summit Steering Connection Labour
- Summy Sound Tech Workers Union
- Sunden Workers Union
- Sunflag Labour Union
- Sunny Workers Union
- Sunstar Thailand Workers Union
- Suntext Thailand Workers Union
- Supathanakor Paper Mill Workers Union
- Superfine Workers Union
- Supervisory Workers Union
- Suraphon Seafood Labour Union
- Surat Thani Mine Labour Union
- SVI Elastomer Labour Union
- Syddy Toys Workers Union
- Syntech East Workers Union
