Suburban Chennai includes almost half of the places in the districts of Kancheepuram, Tiruvallur and Chengalpattu. It is the 1 st largest district in the state by Population. Together with the Chennai City district, they form the Chennai metropolitan area. Chennai is a metropolitan city in the southern region of India. It is the smallest and densest of all the districts in the state. As of 2011, the district had a population of 7,100,000 with a sex-ratio of 989 females for every 1,000 males. Chennai district Total population is 4681087 according to census 2011.Males are 2357043 and Females are 2324044.Literate people are 3097007 among total.Its total area is 174 sq.km. This has attracted a huge influx of the people to Chennai for various purposes, such as employment, business, education etc. Due to the fast paced development taking place in the urban area, it has become the hub of all the major activities. Chennai district, formerly known as Madras district, is one of the 38 districts in the state of Tamil Nadu in India. Most of the Greater Chennai City comes under this district, erstwhile under Tiruvallur, Kanchipuram and Chengalpattu districts.