The provisional data released by the Department of Census Operations Tamilnadu shows that Chennai District is the second district in India to top the Density Index with a population density of 26,903 people per square kilometer in 2011. This figure was 24,963 per square kilometer in 2001.
The first district is the North East District of National Capital Territory of Delhi with 37,346 people per square kilometer.
The growth in the density of Chennai is primarily due to shift of people from elsewhere for better educational, employment and business activities mainly due to good infrastructure, education & medical facilities and better workforce.
Chennai with a 100 percent urban population comes first in terms of urban population followed by Kanyakumari District with 82.47 percent and Coimbatore District with 75.83.
Chennai is the no.1 district with a population of 46,81,087. This is 6.49 percent of the population in Tamilnadu. In 2001, the population was 43,43,645, 6.96 percent to the population of the state. The total population in Tamilnadu is 7,21,38,958 with 3,61,58,871 males and 3,59,80,087 females. The decadal population growth in Tamilnadu is 15.60 per cent and the sex ration is 995 females per 1000 males. The literacy rate is 80.33 percent.
One interesting data, Dibang Valley district in Arunachal Pradesh is on the top spot for having only 1 person per square kilometer and this district is also the least populous district.