A

Adi Dravidar Welfare
Administrator General and Official Trustee of Tamil Nadu
Advocate General of Tamil Nadu
Agricultural Engineering
Agricultural Marketing and Agri Business
Agriculture Directorate
AIDS Control Society
Air Port Security
All Women Police Stations
Animal Husbandry Directorate
Archaeology
Archives and Historical Research
Arignar Anna Government Hospital of Indian Medicine
Armed Police
Art and Culture
Arts and Crafts College

B

Backward Classes Welfare Directorate
Backward Classes Commission

C

C I D Crime Branch 
Central Polytechnic
Central Press
Central Prison
Chengalpattu Range Police
Chennai,  Madras Medical College
Chief Metropolitan Magistrates Court
City Civil Court
City Government Pleader
Civil Supplies and Consumer Protection Commissionerate
Civil Supplies CID
Coastal Security Group
Collectorate of Chennai
Collegiate Education
Commercial Taxes, Chennai-5
Commercial Taxes, Chennai-6
Commissionerate of e-Governance
Commissioner of Police, Chennai 
Co-operative Audit
Co-operative Societies
Co-operative Societies (Housing)
Council for Science and Technology
Court of Small Causes

D

Dairy Development
Dam Safety Directorate
Data Centre (GDC)
Debts Recovery Tribunal
Dental College and Hospital
Director General of Police
Disciplinary Proceedings Commissionerates
District Consumer Disputes Redressal Forum (North)
District Consumer Disputes Redressal Forum (South)
District Primary Education Programme (SSA)
District Employment Office
District Employment Office for Physically Handicapped
District Employment Office for Unskilled
District Treasury Office, Chennai
Dr Dharmambal Government Polytechnic for Women
Drugs Control

E

Economic Offences Wing (Police)
Economics and Statistics
Electrical Circle (PWD)
Electrical Inspectorate
Elementary Education
Employment and Training Commissionerate
Engineer in Chief (Water Resources Organisation) and Chief Engineer (General) PWD
Environment Directorate
Evaluation and Applied Research
Ex-Servicemen's Welfare
Eyal Esai Nataka Mandram

F

Factories Inspectorate (Labour & Employment)
Family Court
Family Welfare Directorate
Finger Print Bureau
Fire and Rescue Service
Fisheries Directorate
Forensic Science
Forests Department

G

General Hospital
General Stamp Office, Treasuries and Accounts
Geology and Mining
Government Branch Press, High Court Campus
Government Data Centre (GDC)
Government Examinations
Government Hospital for Thoracic Medicine
Government Publication Depot
Government Stationery Stores
Groundwater Circle (PWD)
Guest Houses
 

H

Handlooms and Textiles Directorate
High Court
Highways and Rural Works
Highways Research Station
Hindu Religious and Charitable Endowments
Home Guards and Civil Defence
Horticulture & Plantation Crops

I

Indian Medicine and Homoeopathy
Industrial Training Institute (Ambattur)
Industrial Training Institute (Guindy)
Industrial Training Institute for Women
Industrial Training Institute (North)
Industrial Tribunal
Industries and Commerce Commissionerate
Information and Public Relations
Institute of Chemical Technology
Institute of Child Health and Hospital for Children
Institute of Labour Studies
Institute of Leather Technology
Institute of Mathematical Sciences
Institute of Mental Health
Institute of Obstetrics and Gynaecology and Government Hospital for Women and Children
Institute of Ophthalmology and Government Ophthalmic Hospital
Institute of Printing Technology
Institute of Rehabilitation Medicine
Institute of Textile Technology
Institute of Thoracic Medicine
Institute of Water Studies
Integrated Child Development Services Project (ICDS)
Internal Audit and Statutory Boards Audit
International Institute of Tamil Studies

K

Kalaivanar Arangam I&PRO
Kasturba Gandhi Hospital for Women and Children
Kilpauk Medical College and Hospital
King Institute of Preventive Medicine

L

Labour Commissionerate
Labour Court
Land Administration
Land Reforms
Law Commission
Legal Studies
Literacy Mission Authority
Local Fund Audit

M

Madras Institute of Development Studies (MIDS)
Madras Medical College and Research Institute
Mahakavi Bharathiar Illam State Information Centre
Medical and Rural Health Services
Medical Education Directorate
Minorities Commission
Minorities Welfare Directorate
MGR Film and Television Institute of Tamil Nadu
Most Backward Classes and Denotified Communities Welfare
Motor Vehicles Maintenance
Municipal Administration
Museum
Music College

N

National Cadet Corps
National Highways
Non-formal and Adult Education

O

Office of Chief Engineer (Mechanical) (HRW)
Office of Government Pleader
Office of Official Assignee
Office of Public Prosecutor
Operation and Maintenance (HRW)

P

Pay and Accounts Office (East)
Pay and Accounts Office (North)
Pay and Accounts Office (Secretariat)
Pay and Accounts Office (South)
Pension Directorate
Pension Pay Office
Peripheral Hospitals
Periyar Science and Technology Centre
Plan Formulation (PWD)
Planning Commission
Police Stations
Police Telecommunication 
Police Training College
Police Transport Workshop
Prisons Department
Private Colleges Appellate Tribunal
Professional and Executive Employment Office
Prohibition and Excise
Prohibition Enforcement Wing of Police
Prosecution
Public Health and Preventive Medicine
Public Libraries
Public Service Commission (TNPSC)
Public Works Department (PWD)

Q

Q Branch CID

R

R S R M Hospital
Railway Police
Rajaji Hall I&PRO
Regional Institute of Ophthalmology and Government Ophthalmic Hospital
Registrar of Co-operative Societies
Registration
Rehabilitation
Reproductive and Child Health Project
Resident Commissioner at New Delhi
Revenue Administration, Disaster Management and Mitigation
Road Sector Project
Royapettah Hospital
Rural Development
Rural Roads (HRW)

S

Sales Tax Appellate Tribunal
School Education
Science and Technology Centre
Seed Certification
Senior Standing Counsel 
Small Savings Directorate
Social Defence
Social Welfare and Nutritious Meals Programme
State Commissioner for the Disabled
State Consumer Disputes Redressal Commission
State Election Commission
State Groundwater and Surface Water Resources Data Centre
State Human Rights Commission
State Information Commission
State Institute of Commerce Education
State Transport Appellate Tribunal
Stationery and Printing
Sugar Directorate
Survey and Settlement

T

Tamil Arasu Publications
Tamil Development
Tamil Etymological Dictionary Project
Tamil Nadu Administrative Tribunal
Tamil Nadu e-Governance Agency (TNEGA)
Tamil Nadu Films Division
Tamil Nadu Information Commission
Tamil Nadu State Judicial Academy
Tamil Nadu Urban Development Project (TNUDP)
Taxation Special Tribunal
Teacher Education Research and Training
Teachers' Recruitment Board
Technical Education
Technical Services (Police)
Third State Finance Commission
Thiruvatteeswarar Hospital of Thoracic Medicine
Tourism
Town and Country Planning
Town Panchayats
Transport
Treasuries and Accounts
Tribal Welfare Directorate

U

Uniformed Services Recruitment Board
Urban Land Ceiling and Urban Land Tax

V

Valluvarkottam I&PRO
Vigilance and Anti-Corruption