| Andaman Forest Workers Solidarity Union | | A&N Wild Life Workers Union |
| Nagarpalika Karamchari Union |
| Government Press Employees' Union |
| Tourist Workers Union |
| ANIIDCO Employees Solidarity Union |
| Independent APWD Workers' Union |
| Electricity Workers Solidarity Union |
| Andaman Sarkar Karshik Karamchari Sangh |
| Plantation Crops Workers' Union |
| Animal Husbandry Employees Union |
| Government Motor Transport Drivers Union |
| Bihar Rajya Vidyut Karya Vibagh Karamchari Sangh |
| National Textile Corporation Workers Union |
| Bihar Rajya Janwadi Bidi Mazdoor Union |
| Bihar Shiksha Pariyojna Parishad Employees Union |
| Patna Nagar Nigam Kamgar Union |
| Vankos Karamchari Union |
| Bihar Krishi Utpadan Bazar Samiti Shramik Sangh |
| Bihar Rajya Sthaniya Nikay Karamchari Mahasangh |
| Bihar Baloo Mazdoor Avam Nawik Kalyan Sangh |
| East Central Railway Employees Union |
| Riksha-Thela-Tumtum Chalak Sangh |
| Vaishal Pataliputra Karamchari Avam Padadhikari Sangh |
| Bihar Rajya Nirman Mazdoor Union |
| Eastern Railway Employees Union |
| Bihar Rajya Awas Board Arajpatrit Karamchari Sangathan |
| Bhumi Vikas Bank Karmi Sangh |
| Shri Vaidyanath Ayurvaid Bhawan Mazdoor Union |
| G. K. Cotton Mazdoor Union |
| Bihar Rajya Poldar Mazdoor Union |
| Gaya Zila Auddyogik Kamgar Union |
| Imarat-e-Sharia Kamgar Union |
| Graphite India Ltd. Karamchari Sangh |
| Bihar Pradesh Khet Mazdoor Sabha |
| Patna Zila Nijee Vahan Chalak Awam Karamchari Sangh |
| Bihar Rajya Cement Pattharkatti Mazdoor Union |
| Centra Pvt. Ltd. Karamchari Panchayat |
| PPCL Karamchari Panchayat |
| Centre of Steel Workers, Bokaro |
| Janwadi Mazdoor Morcha |
| Jharkhand General Mazdoor Union |
| Motor Kamgar Union |
| Coal Mines Workers Union |
| Central Govt. Hospital Workers Union |
| Textile Mazdoor Ekta Manch |
| Tannery and Leather Workers Ekta Manch |
| Uttar Pradesh Khet Mazdoor Sabha |
| Auto Parts Karamchari Union Kanpur |
| Tempo-taxi Karamchari Sabha Kanpur |
| Jawaharlal Rohtagi Netra Chikitsiyalay Karamchari Union |
| Nirman Mazdoor Union |
| Ladayak Mill Mazdoor Duniya |
| Ladayak Mazdoor Duniya |
| All Ahmedabad Gumasta Sewa Mandal |
| Powerlooms Majoor Sangh |
| All Gujarat General Mazdoor Sewa Sangh |
| All Gujarat Jaher Bandhkam Majoor Mandal |
| Sodou Asom ASHA Santha |
| All Assam Contractor Workers' Union |
| Tarai Sangrami Cha Sramik Union |
| Bhartiya Motor Karmi Union |
| Hariharpur Langal Beriya Rickshaw Chalak Union |
| Jayshree Textiles Sramik Union |
| Majherchar Itt Bhatta Mazdoor Union |
| Shibdaspur Intt Bhatta Mazdoor Union |
| Steinhaus (I) Pvt. Ltd. Workers Union |
| Eastern Railway Bandel- Katwa Shakha Sangrami Hawkers' Union |
| Nabadwip Goods Motor Transport Workers Union |
| Krishnanagar Motor Transport Workers Union |
| Sealdah Divn. Sangrami Rly. Hawkers Union |
| Calcutta Eating Refreshment Estabtt. Workmen's Union |
| Birsul Hat Leather Hawkers Union |
| Balrampur Chini Mills Ltd. Workers' Union |
| Calcutta Hosiery Workers Union |
| Jadavpur-Dhakuria Rickshaw Van-School Van Chalak Union |
| Silverton Metal Pvt. Ltd. Workmens Union |
| Jay Engineering Works Ltd. Mazdoor Union |
| National Art Press& Dot Graphics Workmen Union |
| Uttar Kolkata LPG Distributors Mazdoor(Refil Man) Union |
| DTC Workers' Unity Centre |
| All India General Kamgar Union |
| Building Workers' Union |
| United Workmen Union |
| All Assam Press Workers' Union |
| All Assam Plywood Mazdoor Union |
| Furniture Mazdoor union |
| Coal Mine Workers' Union |
| Asom Sangrami Chah Shramik Sangha |
| Karbi-Anglong & North Cachar Kishan Shramik Sabha |
| All Assam Hawkers' Union |
| Assam State Tailoring Workers' Union |
| Scooter India Kamgar Union |
| Eveready Flash Light Mazdoor Union |
| Nagar Nigam Safai Mazdoor Union Allahabad |
| IPSS Mazdoor Union |
| Janwadi Mazdoor Ekta Kendra |
| Centre of Steel Workers |
| Jananayaga Thozhilalar Sangam |
| Jananayaga Hotel Thozhilalar Sangam |
| Chennai Perunagara Jananayaga Thozhilalar Sangam |
| Chengai Anna Mavatta Jananayaga Thozhilalar Sangam |
| Tamilnadu Arasu Achaga Podhu Thozhilalar Sangam |
| Salem Mavatta Jananayaga Visaithari Thozhilalar Sangam |
| Aruna Hotel Thozhilalar Nala Sangam |
| Chennai Perunagara Jananayaga Auto Ottunar Sangam |
| Tamilnadu Jananayaga Kattumaana Thozhilalar Sangam |
| Mavatta Jananayaga Beedi Thozhilalar Sangam |
| Jananayaga Sumai Thookkum Thozhilalar Sangam |
| Kanchi Kamakodi Kulandaigal Arakkattalai Maruthuvamanai Uzhiyar Sangam |
| Pondicherry Jananayaga Kattumana Thozhilalar Sangam |
| Transmedica Thozhilalar mattrum Uzhiyar Sangam |
| Puthuvai Udal Uzhaipaour Sangam |
| Pondicherry Chemical Thozhilalar Sangam |
| Pondicherry Democratic Leather Products Workers' Union |
| Puduvai Manila nesavalar Sangam |
| Puduvai Samayal Vaivu Vimiyoga Thozhilalar Sangam |
| Jananayaga Panjalai Thozhilalar Sangam |
| Kanti Bijli Utpadan Kamgar Union |
| Auddyogik Mazdoor Union |
| Asangathit Kamgar Mahasangh |
| Akhil Bhartiya Railway Vendor Hawkers Union |
| Bihar State Motor Mechanic Union |
| Nalanda Biscuit Company Ltd. Mazdoor Union |
| Asom Rickshaw Thela Chalak Union |
| Sodou Asom Nirman Shramik Union |
| Asom Griha Shramik Mahila Union |
| Municipal Kamgar Karamchari Purogami Union, Mumbai |
| Maharashtra Rajya Sarva Shramik Mahasangh |
| Karnataka General Labour Union |
| Karnataka Pragathipara Kattada Karmikara Sangha (KPKKS) |
| Hingalganj-Hasnabad Engine Chalito Van Chalak Union |
| South-Eastern Railway Thika Sramik Union |
| Kojoria Foundry Works (P) Ltd. Mazdoor Union |
| Paschim Bango Griha O Anyanya Nirman Shramik Karamachari Union |
| Aram Bagh Hatchery Ltd. Workers' Union |
| Bongan Mahakuma Sangrami Motor Shramik Union |
| Calcutta Tramways Company Bus Drivers and Karamchari Samiti |
| Calcutta State Transport Corporation Sangrami Shramik Karmachari Union |
| Vaskar Tea traders and Associated Employees Union |
| Posta Bazar Sangrami Mutiya Mazdoor Union |
| West Bengal Power Development Corporation Ltd. Workers' Union |
| Bengal Chatkal Mazdoor Forum |
| All West Bengal State Transport Sangrami Shramik Karamchari Union |
| Paschim Banga Sangrami Bidi Shramik Union |
| Dhalar Bagan Dolon's Food Product Private Ltd. Shramik Karamchari Union |
| Kumari Mavatta Puratchigara Kattumanam & Podhu Thozhilalar Sangam |
| Uzhaippor Urimai Eyakkam |
| Kovai Mavatta Pricol Thozhilalarkal Ottrumai Sangam |
| Tamilnadu Nugarporul Vaniba Kazhaga Jananyaga Angadigal Matrum Podhu Thozhilalar Sangam |
| Makkal Sakthi Podhu Thozhilalar Sangam |
| West Dinajpur Spinning Mills Sramik Union |
| Darjeeling Zilla Sangrami Niraman Mazdoor Union |
| Mutia Mazdoor Union, Cooch Behar |
| Mandalpara Rickshaw-van Chalak Union |
| Defence Contract Labour Union |
| India Trimmings Trade Union |
| Jananayaga Podhu Thozhilalar Sangam |
| Subha Plastic Pvt. Limited Thozhilalar Koottamaippu Sangam |
| Anaithidhinthia Vivasaya Thozhilalar Sangam |
| Katai Mill Mazdoor Morcha, Banda |
| Sachiv Parishad Sahakari Rinn Samitian Kanpur |
| Bidi Mazdoor Union Faizabad |
| Theka Mazdoor Ekta Manch Faizabad |
| Jal Sansthan Karamchari Union Kanpur |
| IFFCO Theka Mazdoor Union Allahabad |
| Tempo-taxi Ekta Union Kanpur |
| Nirman Shramik Sangathan Kanpur |
| UP Industrial Consultants Staff Association |
| Engineering Workers' Association Kanpur |
| Allahabad Medical Workers' Union |
| Poorvottar Railway Workers' Union |
| Uttar Pradesh Gram Rozgar Samvida Sevak Sangh |
| Nirman Mazdoor Union Jalaun |
| Sarda Sahay Sugar Mill Karamchari Union Palia Kalan Lakhimpur Khiri |
| Palledar Shramik Samiti |
| Hargaon Sugar Mill Karamchari Union |
| Nalkoop Nigam Karamchari Sangh Lucknow |
| Bhartiya Rice Mill Palledar Mazdoor Sangathan Puranpur |
| LPG Bottling Plant Karamchari Union |
| Chemical Mazdoor Union |
| Chattisgarh Bidi Mazdoor Sangh Rajnand Gaon |
| Chhatishgarh Hamal Mazdoor Sangh Rajnand Gaon |
| Badve Engineering Workers' Union SIDCUL, Pantnagar, |
| B.S.N.L. Casual and Contract Workers Union UTTRAKHAND |
| MAA KALIJAYEE MOTOR BOAT WORKERS UNION |
| TBRL Contract Workers' Union |
| PGI Contract Employees' Union |
| Sangharshsheel Engineering Shramik Sangh |
| Engineering College Mess Employees' Union |
| Ekta Contract Workers' Union, GMSH, Sector-16 |
| Sarva Safai Karamchari Union, ISBT Sector-43 |
| INDIA CARBON EMPLOYEES AND LABOUR UNION |
| Pondicherry Synthetic Products Democratic Workers union |
| Mettupalayam Industries Labour Union |
| DXN Labour Union |
| Cycle Parts Jananayaga Thozhilar Sangam |
| Kumaran Gas Agencies Thozhilar NalaSangam |
| PL Haulwel Trailers Labour Union |
| Hariharpur Langal Beria Rickshaw Chalak Union |
| Avasiya Samiti Shramik Union |
| Nirman Udyog Shramik Union |
| Engineering Udyog Shramik Union |
| Garments Udyog Shramik Union |
| Greater Noida Audyogik Vikas Pradhikaran Dainik Vetan Bhogi Karamchari Sangh |
| TCS Samuha Kamgar Sangh |
| MTNL Karamchari Ekta Union |
| Andhara Pradesh Vyavsaya Kuli Sangam |
| Indo Japan Air Services Staff Union |
| Security and Intelligence Services SIS (India) Ltd. Karmachari Union |
| MADRAS GYMKHANA CLUB STAFF & WORKERS UNION |
| Rajasthan Nirman Mazdoor Sangathan |
| LRSTB Hospital Karamchari Panchayat |
| Ispat Labour Union |
| Bihar Rajya Autoricksha (tempo) Chalak Sangh |
| Audyogic Kamgar Union |
| Azad Mazdoor Dal |
| Chittaranjan Locomotive Works Railway Employees' Union |
| Thakurpukar Bazar Hawkers Union |
| Jharkhand Rajya Paijal avam Svachata Vibhag Karamchari Sangh (Drinking water and sanitation) |
| Shramik Kalyan Manch |
| Buildworth Shramik Union |
| Assam State Fertilizer Workers union |
|
| Guwahati Refinery Co-operative Society Workers' Union |
| Jalpaiguri Zilla Sangrami Mutia Mazdoor Union |
| Darjeeling Zilla Sangrami Security Workers' Union |
| Lal Jhanda Bhatta Mazdoor Union |
1. ^{{cite web|url=http://www.labourfile.org/superAdmin/Document/113/table%201.pdf |title=Table 1: Aggregate data on membership of CTUOs 1989 and 2002 (Provisional) |publisher=Labour File |deadurl=yes |archiveurl=https://web.archive.org/web/20110409191235/http://www.labourfile.org/superAdmin/Document/113/table%201.pdf |archivedate=9 April 2011 }}