The Public Works Department of Tamil Nadu is a state government owned authority, and is in charge of public sector works in the State of Tamil Nadu. It is part of the Ministry of Public Works Department, and is entrusted with the construction and maintenance of buildings for most of the government departments and public undertakings, and the construction of bridges, roads, and infrastructure.

All India Anna Dravida Munnetra Kazhagam (AIADMK) (Tamil: அண்ணா திராவிட முன்னேற்ற கழகம்) (lit. All India Anna Dravidian Progress Federation) is a state political party in the states of Tamil Nadu and Puducherry, India. It is currently in power in Tamil Nadu. It is a Dravidian party founded by M.G. Ramachandran (popularly known as MGR) in 1972 as a breakaway faction of the Dravida Munnetra Kazhagam (DMK). Since 1989, AIADMK is headed by J. Jayalalithaa, the current Chief Minister of Tamil Nadu.

India Meteorological Department (IMD) was established in 1875. It is the National Meteorological Service in India and is the principal government agency in all matters relating to Meteorology, Seismology and allied subjects. For administrative control and technical operations, six Regional Meteorological Centres (RMCs) function with their headquarters at Kolkatta, Chennai, Guwahati, Mumbai, Nagpur and New Delhi. 

The Tamil Nadu State Election Commission, an independent, autonomous Constitutional authority formed under the Constitution of India as per the Provisions of the 73rd and 74th Amendments Acts of 1992 is governed by the State Election Commissioner.   As per Article 243-K read with 243-ZA of the Constitution of India, all elections to Panchayats and urban local bodies are to be held under the superintendence, direction and control of the State Election Commission. 

The Tamil Nadu State Election Commission came into inception from 15th July 1994.

The Government of Tamil Nadu have constituted a new Board for School Examination viz "Tamil Nadu State Board of School Examination" by merging the existing two separate boards (1) Board of Secondary Education and (2) Board of Higher Secondary Examinations.

The Chennai Mofussil Bus Terminus or CMBT (Tamil: சென்னை புறநகர் பேருந்து நிலையம்) is a modern, state-of-the-art bus terminus located in Chennai, India catering to outstation buses.

"VANIMAHAL" meaning the abode of Saraswathi is one of the oldest and most popular Sabha promotes traditional music drama and breathes new life into the art of religious discourse or "Harikatha".

SRI THYAGA BRAHMA GANA SABHA is a favorite among both rasikas and artistes who vie for opportunities to showcase their talent in the prestigious sabha. Regular music, dance and drama programs are conducted throughout the year and these are well-attended by both the members of the Sabha as well as the general public.

The Chennai Metropolitan Development Authority (CMDA) (Tamil: சென்னை பெருநகர வளர்ச்சி குழுமம்), formerly known as Madras Metropolitan Development Authority (MMDA) is the nodal planning agency within the Chennai Metropolitan Area. The MMDA (CMDA) was constituted under the Tamil Nadu Town and Country Planning Act 1971 as the nodal Town planning authority for the city of Madras (now Chennai) and its suburbs. It is headed by Minister for Housing as its Chairman.

Government General Hospital or G.G.H. is a major hospital situated in Chennai, India. The hospital is funded and managed by the state Government of Tamil Nadu; hence it is state-owned. It was founded in 1664 by the British East India Company. In the 19th century, Madras Medical College joined it.