Chennai Population, According to the latest data from the Census of India, the population of Chennai, the capital city of the Indian state of Tamil Nadu, is approximately 10 million as of 2021. Chennai is an important economic and cultural center, with a thriving business community and a number of important educational and research institutions. The city is known for its rich cultural heritage, with a number of important temples and other landmarks located throughout the region. It is also a major tourist destination, with a number of iconic landmarks and cultural attractions, such as the Marina Beach and the Fort St. George Museum. The city has a diverse population, with people from various cultural and linguistic backgrounds living and working in the region.