# List of public sector organisations in Tamil Nadu

Tamtam tracks 43 public sector organisations headquartered in Tamil Nadu. This list ranks all of them by number of employees on LinkedIn, led by Indian Bank, Indian Institute of Technology, Madras and INDIAN OVERSEAS BANK. Their median headcount is 640. Half of them were founded in 1968 or later. The most common headquarters are Chennai (31) and Coimbatore (2).

This selection of public sector organizations in Tamil Nadu largely comprises government-owned banks and higher education institutions. Many of these are large, well-established entities. Indian Bank, founded in 1907, provides diverse financial services, while the Indian Institute of Technology, Madras, established in 1959, focuses on technological education and research. Other prominent organizations include Anna University Chennai, offering higher education in engineering, and United India Insurance Co. Ltd., a government-owned general insurance company.

A significant pattern is the concentration of headquarters in Chennai, indicating it as a primary hub for public sector operations in the region. The list also shows a strong emphasis on education and financial services, with several institutions dedicated to each sector. For instance, Tamil Nadu Agricultural University in Coimbatore focuses on agricultural degree programs, and the High Court of Madras, established in 1862, serves as a key legal institution.

🇮🇳 Tamil Nadu · 43 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Indian Bank](https://www.tamtam.ai/c/indian-bank) (indianbank.bank.in)<br>Offers diverse financial services including deposits, loans, cards, and remittances across India and internationally, serving various customer segments. | Banking | 🇮🇳 Chennai | 16,376 | 1907 |
| 2 | [Indian Institute of Technology, Madras](https://www.tamtam.ai/c/indian-institute-of-technology-madras) (iitm.ac.in)<br>An institute of national importance offering higher technological education, research, and consultancy services with a focus on engineering and pure sciences | Higher Education | 🇮🇳 Chennai | 9,505 | 1959 |
| 3 | [INDIAN OVERSEAS BANK](https://www.tamtam.ai/c/indian-overseas-bank) (iob.bank.in)<br>Government-backed public sector bank providing financial services with majority ownership from the Government of India | Banking | 🇮🇳 Chennai | 7,711 | 1937 |
| 4 | [Anna University Chennai](https://www.tamtam.ai/c/anna-university-chennai) (annauniv.edu)<br>Higher education in engineering, technology, architecture, applied sciences with focus on research and industry-academia collaboration for societal needs. | Higher Education | 🇮🇳 Chennai | 7,705 |  |
| 5 | [invalid15094330](https://www.tamtam.ai/c/invalid15094330) (annauniv.edu)<br>An educational institution offering higher education in engineering, technology, and allied sciences, promoting research, and fostering cooperation between academia and industry | Higher Education | 🇮🇳 Chennai | 3,330 |  |
| 6 | [Tamil Nadu Agricultural University](https://www.tamtam.ai/c/tamil-nadu-agricultural-university) (tnau.ac.in)<br>The organization is an agricultural university offering various degree programs in agriculture, horticulture, forestry, and home science since 1971 | Higher Education | 🇮🇳 Coimbatore | 2,704 | 1971 |
| 7 | [High Court of Madras](https://www.tamtam.ai/c/high-court-of-madras) (tn.nic.in)<br>A historic high court in Tamil Nadu, India, established in 1862 under Queen Victoria's Letters patent, serving as a key legal institution | Administration of Justice | 🇮🇳 Chennai | 2,268 |  |
| 8 | [United India Insurance Co. Ltd.](https://www.tamtam.ai/c/united-india-insurance-co-ltd) (uiic.co.in)<br>A government-owned general insurance company in India offering a range of insurance products and services to customers | Insurance | 🇮🇳 Chennai | 2,138 |  |
| 9 | [University of Madras](https://www.tamtam.ai/c/university-of-madras) (unom.ac.in)<br>Higher education institution offering a wide range of courses with experienced faculty focused on quality education and student development. | Higher Education | 🇮🇳 Chennai | 1,933 |  |
| 10 | [Indian Overseas Bank](https://www.tamtam.ai/c/indian-overseas-bank-chennai) (iob.bank.in)<br>An established public sector bank in India, dedicated to serving the nation with financial services since 1937 | Banking | 🇮🇳 Chennai | 1,478 |  |
| 11 | [High Court of Judicature at Madras](https://www.tamtam.ai/c/high-court-of-judicature-at-madras) (hcmadras.tn.nic.in)<br>Established in 1862, the High Court of Judicature at Madras is the highest court in Tamil Nadu, exercising original and appellate jurisdiction | Administration of Justice | 🇮🇳 Chennai | 1,201 | 1862 |
| 12 | [National Institute of Technology, Tiruchirappalli](https://www.tamtam.ai/c/national-institute-of-technology-tiruchirappalli) (nitt.edu)<br>A leading university offering doctoral programs in STEM fields, focusing on excellence in technology and research, with international partnerships and cultural events attracting students nationwide | Higher Education | 🇮🇳 Tiruchirappalli | 1,128 | 1964 |
| 13 | [TANGEDCO](https://www.tamtam.ai/c/tangedco) (gov.in)<br>The company is a leading energy provider and distributor established in 1957, restructured in 2008 to include subsidiary companies for transmission, generation, and distribution | Government Administration | 🇮🇳 Chennai | 1,093 |  |
| 14 | [Central Institute of Plastics Engineering & Technology (CIPET)](https://www.tamtam.ai/c/central-institute-of-plastics-engineering-and-technology-cipet) (cipet.gov.in)<br>An autonomous institute in India offering training and services in the field of plastic engineering, including design, processing, testing, and consultancy | Education Administration Programs | 🇮🇳 Chennai | 1,044 | 1968 |
| 15 | [Periyar University](https://www.tamtam.ai/c/periyar-university) (periyaruniversity.ac.in)<br>A renowned university in Tamilnadu established in 1997, offering various postgraduate programs and accredited with 'A' grade by NAAC | Higher Education | 🇮🇳 Salem | 883 |  |
| 16 | [Chennai](https://www.tamtam.ai/c/chennai) (chennaimetrorail.org)<br>The company operates a rapid transit system in Chennai, India, providing efficient transportation services to the city's residents and visitors | Truck Transportation | 🇮🇳 Chennai | 881 | 2007 |
| 17 | [Tamilnadu Newsprint and PapersLimtied](https://www.tamtam.ai/c/tamilnadu-newsprint-and-paperslimtied) (tnpl.com)<br>A producer of newsprint and paper products based in Tamil Nadu, specializing in printing and writing papers for various industries | Paper and Forest Product Manufacturing | 🇮🇳 Chennai | 829 |  |
| 18 | [CSIR - Central Leather Research Institute](https://www.tamtam.ai/c/csir-central-leather-research-institute) (clri.org)<br>A pioneering institute in India dedicated to advancing research, technology, education, and innovation in the leather sector for economic growth and global leadership | Research Services | 🇮🇳 Chennai | 801 | 1948 |
| 19 | [Tamil Nadu Veterinary and Animal Sciences University](https://www.tamtam.ai/c/tamil-nadu-veterinary-and-animal-sciences-university) (tanuvas.tn.nic.in)<br>The organization focuses on education, research, and extension activities in veterinary, animal, fisheries, food, and dairy sciences to benefit farmers | Higher Education | 🇮🇳 Chennai | 692 |  |
| 20 | [MMTC Limited](https://www.tamtam.ai/c/mmtc-limited) (mmtclimited.com)<br>India's largest trading giant with extensive international trade network, specializing in import-export operations, promoting joint ventures for market opportunities worldwide | Wholesale Import and Export | 🇮🇳 Chennai | 689 | 1963 |
| 21 | [NPTEL](https://www.tamtam.ai/c/nptel) (nptel.ac.in)<br>Provides free high-quality digital education resources, including courses in engineering, science, arts, and technology, empowering learners across India to acquire essential skills and knowledge. | E-Learning Providers | 🇮🇳 Chennai | 660 | 1999 |
| 22 | [Chennai Metro Rail Limited](https://www.tamtam.ai/c/chennai-metro-rail-limited) (chennaimetrorail.org)<br>Special Purpose Vehicle implementing Chennai Metro Rail Project, now a Joint Venture of Government of India and Tamil Nadu | Rail Transportation | 🇮🇳 Chennai | 640 | 2007 |
| 23 | [Madras Medical College (MMC)](https://www.tamtam.ai/c/madras-medical-college-mmc)<br>This company is a historic medical institution established in 1664, providing healthcare services, medical education, and research in Chennai, India | Higher Education | 🇮🇳 Chennai | 593 | 1835 |
| 24 | [Government College of Technology, Coimbatore](https://www.tamtam.ai/c/government-college-of-technology-coimbatore) (gct.ac.in)<br>An autonomous state-funded engineering college in Coimbatore, India affiliated to Anna University, known for setting benchmarks in technical education since 1945 | Higher Education | 🇮🇳 Coimbatore | 511 | 1945 |
| 25 | [Indira Gandhi Centre for Atomic Research (IGCAR)](https://www.tamtam.ai/c/indira-gandhi-centre-for-atomic-research-igcar) (igcar.ernet.in)<br>A research organization located in Kalpakkam, Chennai, India, focusing on atomic research and technological advancements in the field | Research Services | 🇮🇳 Chennai | 511 | 1971 |
| 26 | [Manonmaniam Sundaranar University](https://www.tamtam.ai/c/manonmaniam-sundaranar-university) (msuniv.ac.in)<br>An institution of higher learning in rural Tamil Nadu, providing education to 73,000 students through affiliated and constituent colleges | Higher Education | 🇮🇳 Tirunelveli | 510 | 1990 |
| 27 | [Bharathidasan University, Tiruchirappalli](https://www.tamtam.ai/c/bharathidasan-university-tiruchirappalli) (onlinecareer360.com)<br>Bharathidasan University, Tiruchirappalli in India provides higher education and is located in Tamil Nadu | Higher Education | 🇮🇳 Tiruchirappalli | 478 |  |
| 28 | [Indian Ordnance Factories](https://www.tamtam.ai/c/indian-ordnance-factories) (ofbindia.gov.in)<br>The company specializes in producing, testing, and marketing a wide range of products for land, sea, and air systems with a focus on research and development | Aviation and Aerospace Component Manufacturing | 🇮🇳 Chennai | 444 |  |
| 29 | [National Institute of Ocean Technology](https://www.tamtam.ai/c/national-institute-of-ocean-technology) (niot.res.in)<br>An autonomous institute under the Ministry of Earth Sciences in India specializing in developing ocean technologies for sustainable resource utilization and environmental management | Research Services | 🇮🇳 Chennai | 418 | 1993 |
| 30 | [Madurai Medical College and Hospital (MDUMC)](https://www.tamtam.ai/c/madurai-medical-college-and-hospital-mdumc) (madurai.nic.in)<br>A renowned medical school and hospital in Tamil Nadu, India, providing tertiary care to millions of people since 1954 | Higher Education | 🇮🇳 Madurai | 406 |  |
| 31 | [Indian Institute of Information Technology Design & Manufacturing Kancheepuram](https://www.tamtam.ai/c/indian-institute-of-information-technology-design-and-manufacturing-kancheepuram) (iiitdm.ac.in)<br>A Center of Excellence for design and manufacturing engineering education and research established by the Government of India | Higher Education | 🇮🇳 Chennai | 368 | 2007 |
| 32 | [Bharathidasan University (BDU), Tiruchirappalli](https://www.tamtam.ai/c/bharathidasan-university-bdu-tiruchirappalli) (bdu.ac.in)<br>A recognized university in Tamil Nadu, India with affiliated colleges, offering a wide range of science and arts programs supported by the UGC | Higher Education | 🇮🇳 Tiruchirappalli | 356 |  |
| 33 | [Central Institute of Petrochemicals Engineering & Technology (CIPET)](https://www.tamtam.ai/c/central-institute-of-petrochemicals-engineering-and-technology-cipet) (cipet.gov.in)<br>The company offers education and training for skilled labor in the plastics and polymer science fields, as well as product development and mold production services | Education Administration Programs | 🇮🇳 Chennai | 353 | 1968 |
| 34 | [Tamil Nadu National Law University](https://www.tamtam.ai/c/tamil-nadu-national-law-university) (tnnlu.ac.in)<br>A law university in Trichy providing global standard legal education to students, emphasizing on national level training programs | Higher Education | 🇮🇳 Tiruchirappalli | 351 | 2012 |
| 35 | [TIDEL Park Limited](https://www.tamtam.ai/c/tidel-park-limited) (tidelpark.com)<br>Information technology park in Chennai, part of key infrastructure projects transforming Tamil Nadu with a focus on IT development and economic growth | Real Estate | 🇮🇳 Chennai | 349 | 2000 |
| 36 | [STANLEY MEDICAL COLLEGE & HOSPITAL (Inst. Code - 002), CHENNAI](https://www.tamtam.ai/c/stanley-medical-college-and-hospital-inst-code-002-chennai) (stanleymedicalcollege.ac.in)<br>A medical institution affiliated with the government providing healthcare services, medical education, and research opportunities | Hospitals and Health Care | 🇮🇳 Chennai | 347 | 1740 |
| 37 | [Tamilnadu Electricity Board](https://www.tamtam.ai/c/tamilnadu-electricity-board) (tangedco.gov.in)<br>A government-owned power generation and distribution company based in Tamil Nadu, India | Utilities | 🇮🇳 Chennai | 341 |  |
| 38 | [Central University of Tamil Nadu, Tiruvarur](https://www.tamtam.ai/c/central-university-of-tamil-nadu-tiruvarur) (cutn.ac.in)<br>A higher education institution located in Tamil Nadu, India, providing academic programs and research opportunities for students | Higher Education | 🇮🇳 Thiruvarur | 340 |  |
| 39 | [College of Engineering, Guindy](https://www.tamtam.ai/c/college-of-engineering-guindy) (ceg.annauniv.edu)<br>A higher education institution located in Chennai, India, offering engineering programs from its campus at Anna University in Guindy | Higher Education | 🇮🇳 Chennai | 337 | 1794 |
| 40 | [Anna University](https://www.tamtam.ai/c/anna-university) (annauniv.edu)<br>A public state university in Chennai, India, founded in 1978, named after a former Chief Minister of Tamil Nadu | Higher Education | 🇮🇳 Chennai | 337 |  |
| 41 | [ICMR National Institute of Epidemiology (ICMR - NIE)](https://www.tamtam.ai/c/icmr-national-institute-of-epidemiology-icmr-nie) (nie.gov.in)<br>A hospital & health care company located in Chennai, India, specializing in epidemiology research and studies under the ICMR | Hospitals and Health Care | 🇮🇳 Chennai | 320 |  |
| 42 | [Thiruvalluvar University, Vellore](https://www.tamtam.ai/c/thiruvalluvar-university-vellore) (tvu.edu.in)<br>A state university established in 2002 in Vellore, Tamil Nadu, focused on research, dissemination of knowledge, and economic and social upliftment | Higher Education | 🇮🇳 Vellore | 266 | 2002 |
| 43 | [Bhartiya Nabhikiya Vidyut Nigam Ltd. ( BHAVINI )](https://www.tamtam.ai/c/bhartiya-nabhikiya-vidyut-nigam-ltd-bhavini) (bhavini.nic.in)<br>A government company under DAE focused on constructing and operating Fast Breeder Reactors for electricity generation in India | Nuclear Electric Power Generation | 🇮🇳 Chengalpattu | 199 | 2004 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

## More company lists in Tamil Nadu

- [The largest companies in Tamil Nadu](https://www.tamtam.ai/l/largest-companies-tamil-nadu) (1,609)
- [Manufacturers in Tamil Nadu](https://www.tamtam.ai/l/manufacturers-tamil-nadu) (303)
- [Multinational companies in Tamil Nadu](https://www.tamtam.ai/l/multinational-companies-tamil-nadu) (285)
- [Education providers in Tamil Nadu](https://www.tamtam.ai/l/education-companies-tamil-nadu) (258)
- [Companies with in-house R&D in Tamil Nadu](https://www.tamtam.ai/l/r-and-d-companies-tamil-nadu) (226)
- [Higher Education companies in Tamil Nadu](https://www.tamtam.ai/l/higher-education-companies-tamil-nadu) (168)
- [IT Services and IT Consulting companies in Tamil Nadu](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-tamil-nadu) (152)
- [IT services companies in Tamil Nadu](https://www.tamtam.ai/l/it-services-companies-tamil-nadu) (140)
- [Hardware manufacturers in Tamil Nadu](https://www.tamtam.ai/l/hardware-companies-tamil-nadu) (128)
- [Retail chains in Tamil Nadu](https://www.tamtam.ai/l/retail-chains-tamil-nadu) (96)
- [Automotive manufacturers and suppliers in Tamil Nadu](https://www.tamtam.ai/l/automotive-companies-tamil-nadu) (95)
- [Education Administration Programs companies in Tamil Nadu](https://www.tamtam.ai/l/education-administration-programs-companies-tamil-nadu) (91)
- [Publicly traded companies in Tamil Nadu](https://www.tamtam.ai/l/publicly-traded-companies-tamil-nadu) (83)
- [Professional services firms in Tamil Nadu](https://www.tamtam.ai/l/professional-services-firms-tamil-nadu) (82)
- [Financial services firms in Tamil Nadu](https://www.tamtam.ai/l/financial-services-firms-tamil-nadu) (77)
- [Corporate groups and holding companies in Tamil Nadu](https://www.tamtam.ai/l/holding-companies-tamil-nadu) (77)
- [Critical infrastructure operators in Tamil Nadu](https://www.tamtam.ai/l/critical-infrastructure-operators-tamil-nadu) (76)
- [Companies with a mobile app in Tamil Nadu](https://www.tamtam.ai/l/companies-with-mobile-app-tamil-nadu) (75)
- [Financial Services companies in Tamil Nadu](https://www.tamtam.ai/l/financial-services-companies-tamil-nadu) (75)
- [Healthcare providers in Tamil Nadu](https://www.tamtam.ai/l/healthcare-providers-tamil-nadu) (74)
- [Hospitals and Health Care companies in Tamil Nadu](https://www.tamtam.ai/l/hospitals-and-health-care-companies-tamil-nadu) (70)
- [Motor Vehicle Manufacturing companies in Tamil Nadu](https://www.tamtam.ai/l/motor-vehicle-manufacturing-companies-tamil-nadu) (68)
- [Consulting firms in Tamil Nadu](https://www.tamtam.ai/l/consulting-firms-tamil-nadu) (61)
- [Software Development companies in Tamil Nadu](https://www.tamtam.ai/l/software-development-companies-tamil-nadu) (58)

## The same list elsewhere in India

- [Public sector organisations in India](https://www.tamtam.ai/l/public-sector-organisations-india) (877)
- [Public sector organisations in Maharashtra](https://www.tamtam.ai/l/public-sector-organisations-maharashtra) (111)
- [Public sector organisations in Uttar Pradesh](https://www.tamtam.ai/l/public-sector-organisations-uttar-pradesh) (62)
- [Public sector organisations in Gujarat](https://www.tamtam.ai/l/public-sector-organisations-gujarat) (51)
- [Public sector organisations in West Bengal](https://www.tamtam.ai/l/public-sector-organisations-west-bengal) (49)
- [Public sector organisations in Karnataka](https://www.tamtam.ai/l/public-sector-organisations-karnataka) (48)
- [Public sector organisations in Kerala](https://www.tamtam.ai/l/public-sector-organisations-kerala) (45)
- [Public sector organisations in New Delhi](https://www.tamtam.ai/l/public-sector-organisations-new-delhi) (168)
- [Public sector organisations in Mumbai](https://www.tamtam.ai/l/public-sector-organisations-mumbai) (60)
- [Public sector organisations in Bengaluru](https://www.tamtam.ai/l/public-sector-organisations-bengaluru) (35)
- [Public sector organisations in Kolkata](https://www.tamtam.ai/l/public-sector-organisations-kolkata) (34)
- [Public sector organisations in Chennai](https://www.tamtam.ai/l/public-sector-organisations-chennai) (31)

## The same list elsewhere

- [Public sector organisations in the world](https://www.tamtam.ai/l/public-sector-organisations-in-the-world) (18,493)
- [Public sector organisations in Asia](https://www.tamtam.ai/l/public-sector-organisations-in-asia) (2,206)

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Source: https://www.tamtam.ai/l/public-sector-organisations-tamil-nadu