Tamilnad Mercantile Bank Limited (TMB) is a bank headquartered at Thoothukudi, Tamil Nadu, India. TMB was founded in 1921 as the Nadar Bank, but changed its name to Tamilnad Mercantile Bank in November 1962 to widen its appeal beyond the Nadar community. For the financial year 2018–2019, the bank reported a net profit of ₹ 2585 million. The bank currently has 509 full branches throughout India, 12 Regional offices and two link offices, two central processing centres, one Service Branch, four Currency Chests, 48 eLobby centres, 262 Cash Recycler Machines (Cash deposit machine) and 1151 Automated Teller Machines (ATM). The bank has been expanding its footprint all over India. TMB was rated as the fastest growing Private Sector Bank continuously for the five years from 2010 to 2015. It was also rated as the Best Bank in the years 2013, 2014 and 2015, due to its robust growth. During the years of 2018 and 2019 it did total business of 616 billion rupees. The bank's planned outlay for the financial year is to reach business worth 600 billion rupees, add an additional 24 branches, and increase its ATMs to 1151. The bank has won the Lokmat BFSI Best Private Sector Bank 2014-15 award.

Tamil Nadu (; Tamil: [ˈtamiɻ ˈnaːɽɯ] (listen), abbr. TN) is a state in southern India. It is the tenth largest Indian state by area and the sixth largest by population. Its capital and largest city is Chennai. Tamil Nadu is the home of the Tamil people, whose Tamil language—one of the longest surviving classical languages in the world—is widely spoken in the state and serves as its official language. The state lies in the southernmost part of the Indian peninsula, and is bordered by the Indian union territory of Puducherry and the states of Kerala, Karnataka, and Andhra Pradesh, as well as an international maritime border with Sri Lanka. It is bounded by the Western Ghats in the west, the Eastern Ghats in the north, the Bay of Bengal in the east, the Gulf of Mannar and Palk Strait to the south-east, and the Indian Ocean in the south. The at-large Tamilakam region that has been inhabited by Tamils was under several regimes, such as the Sangam era rulers of the Chera, Chola, and Pandya clans, the Pallava dynasty, and the later Vijayanagara Empire, all of which shaped the state's cuisine, culture, and architecture. After the fall of the Kingdom of Mysore, the British colonised the region and administered it as part of the Madras Presidency, headquartered at the city of Madras, now known as Chennai. After India's Independence in 1947, the Madras State came into existence, whose borders were linguistically redrawn by the States Reorganisation Act, 1956, losing territory to Kerala, Karnataka and Andhra Pradesh. The state was renamed as Tamil Nadu in 1969. It is home to a number of historic buildings, multi-religious pilgrimage sites, hill stations and three World Heritage Sites.The economy of Tamil Nadu is the second-largest in India, with a gross state domestic product (GSDP) of ₹24.85 lakh crore (US$310 billion) and has the country's 11th-highest GSDP per capita of ₹225,106 (US$2,800). It ranks 11th among all Indian states in human development index. Tamil Nadu is the most urbanised state in India, and one of the most industrialised states; the manufacturing sector accounts for more than one-third of the state's GDP. Its tourism industry is the largest among the Indian states. The Tamil film industry plays an influential role in the state's popular culture.