Chennai Chennai is the capital city of Tamil Nadu , known for its rich cultural heritage, historic landmarks, and economic significance. As the political and administrative center, it houses the Tamil Nadu Legislative Assembly, High Court, and key government offices. Chennai, the capital of Tamil Nadu , is a bustling metropolis with a rich history and a vibrant present. Know detailed information about the capital city of Tamil Nadu . Chennai, [d] also known as Madras[e] (its official name until 1996), is the capital and largest city of Tamil Nadu , the southernmost state of India. It is located on the Coromandel Coast of the Bay of Bengal. According to the 2011 Indian census, Chennai is the sixth-most-populous city in India and forms the fourth-most-populous urban agglomeration. Incorporated in 1688, the Greater Chennai Corporation is the oldest municipal corporation in India and the second oldest in the world after ... Chennai, formerly known as Madras, city and capital of Tamil Nadu state, southern India, located on the Coromandel Coast of the Bay of Bengal. Known as the ‘Gateway to South India,’ Chennai is a major administrative and cultural center. Learn more about the history and characteristics of Chennai in this article.