- Country Code : 91
- State Capital : Chennai
- STD Code : 44
EXECUTIVE
Legislative
Administration
Administrative
Judiciary
Heads of Departments
- Adi Dravidar Welfare
- Agricultural Engineering
- Agricultural Income Tax
- Agricultural Marketing
- Agriculture
- Animal Husbandry
- Archaeology
- Architecture Branch
- Archives and Historical Research
- Art and Culture
- Audit for Milk Co-operatives
- Backward Classes & Minorities Welfare
- Buildings Maintenance
- Buildings Organisation
- Central Prison
- Civil Supplies and Consumer Protection
- Co-operative Audit
- Co-operative Societies
- Co-operative Societies (Housing)
- Collegiate Education
- Commercial Taxes
- Council for Science and Technology
- Dairy Development
- Dam Safety Directorate
- DANIDA Health Care Project
- Data Centre
- Design Research and Construction Support (PWD)
- Designs & Investigation (PWD)
- District Employment Office
- Drugs Control
Boards
- Advisory Board (COFEPOSA)
- Advisory Board (National Security Act 1980)
- Agricultural Marketing Board
- Chennai Metropolitan Water Supply and Sewerage Board
- Construction Workers Welfare Board
- Housing Board
- Internal Auditor and Chief Auditor of Statutory Boards
- Khadi and Village Industries Board
- Labour Welfare Board
- Maritime Board
Commission
PSU
- Adi Dravidar Housing and Development Corporation Limited (TAHDCO)
- Agro Engineering and Service Co-operative Federation Limited (ENCOFED)
- Agro Industries Corporation (TAI)
- Arasu Rubber Corporation
- Backward Classes Economic Development Corporation
- Chennai Metropolitan Development Authority(CMDA)
- Civil Supplies Corporation
- Co-operative Spinning Mill Federation Ltd (TANSPIN)
- Co-operative State Agriculture and Rural Development Bank Limited
- Construction Corporation
- Corporation for Development of Women
- Corporation of Chennai
- Electronics Corporation of Tamilnadu Ltd
- Energy Development Agency (TEDA)
- Ex-Servicemen's Corporation
- Film Development Corporation Ltd
- Fisheries Development Corporation
- Forest Plantation Corporation Ltd (TAFCORN)
- Graphite Limited
- Handicrafts Development Corporation
- Handloom Development Corporation
- Handloom Weavers' Co-operative Society (CO-OPTEX)
- Industrial Development Corporation (TIDCO)
- Industrial Explosives Limited (TEL)
- Industrial Investment Corporation
- Industries Promotion Corporation of Tamil Nadu Ltd (SIPCOT)
- Leather Development Corporation
- Marketing Corporation (TASMAC)
- Medical Services Corporation
- Medicinal Plant Farms and Herbal Medicine Corporation Ltd (TAMPCOL)
Tribunal
Universities
- Dr. Ambedkar Law University
- Alagappa University
- Amrita Vishwa Vidyapeetham
- Anna University
- Annamalai University
- AVINASHILINGAM INSTITUTE FOR HOME SCIENCE AND HIGHER EDUCATION FOR WOMEN
- Bharath Institute of Higher Education and Research
- Dakshina Bharat Hindi Prachar Sabha
- Dr. M.G.R. Educational and Research Institute
- Gandhigram Rural Institute
- Indian Institute of Technology Madras
- Karunya Institute of Technology and Sciences
- Madurai Kamaraj University
- Manonmaniam Sundaranar University
- Mother Teresa Women's University
- National Institute of Technology
- Periyar University
- Sathyabama Institute of Science and Technology
- Sathyabama Institute of Science and Technology
- Saveetha Institute of Medical and Technical Sciences
- Shanmugha Arts, Science, Technology & Research Academy
- Sri Chandrasekharendra Saraswathi Viswa Mahavidyalaya
- Sri Ramachandra Medical College and Research Institute
- Tamil Nadu Agricultural University
- Tamil Nadu Dr. MGR Medical University
- Tamil Nadu Open University
- Tamil Nadu Veterinary and Animal Sciences University
- Tamil University
- Tamil Virtual University
- Tamilnadu Veterinary and Animal Sciences University
- Thiruvalluvar University
- University of Madras
- Vellor Institute of Technology
- Vinayaka Mission's Research Foundation
Offices in Delhi