After Mumbai, Tokyo, and Japan, Delhi is expected to become the third largest aggregation in the globe by the year 2015. The people living below the poverty line accounted to 8.23% of the total population in 1999-2000 and recorded the highest percentage of crime report in India.
New Delhi is one of the nine districts of National Capital territory(NCT) of Delhi that came into existence from the month of January 1997 when the Capital was divided into Nine revenue Districts. According to Census 2001, the total population of the nine districts of the national capital territory is as follows:
| District | Population |
| South | 2,258,367 |
| South West | 1,749,492 |
| North | 779,788 |
| North East | 1,763,712 |
| North West | 2,847,395 |
| East | 1,448,770 |
| Central | 644,005 |
| New Delhi | 171,806 |
| West | 2,119,641 |
As per Census 2001, there is a notable change in the rural-urban composition of population per sq. km of land compared to Census 1991. Total area of National Capital Territory, Delhi = 1483 Sq.Km
| Rural Area | Urban Ares | Total | |
| As per 1991 Census : | 797.66 Sq.Kms | 685.34 Sq. Kms | 1483 Sq.Km |
| As per 2001 Census: | 591.01 Sq.Kms | 891.09 Sq.Kms | 1483 Sq.Km |
The population density of Delhi is 9294 Sq.Kms whereas the population density of New Delhi stands alone to 4909 Sq.Kms. The female Sex composition is 821 women per 1000 men whereas the literacy rate is 81.82%.
The increment of Delhi's population from the 240,000 in 1911 to nearly 13,782,000 (Census 2001) is due to inflow of a great number of expatriates into the city since the time of independence from the nearby states and adjacent countries. Today, the composition of population in Delhi ruminates the perfect cosmopolitan image, with nearly half the total population arriving from outside. The Cosmopolitan city bears with it multi-ethnic and multi-culture with diverse religious composition of the population.
The official record states that 82% of the population follow Hinduism, 11.7% are Muslims, Sikhs composes of 45 of the total population, Jains are 1.1% whereas 0.9 % of the community are Christians. There are other minority communities like Buddhists and Jews residing in the capital. While Hindi is the official language, English is considered to be the associate official Language. Urdu and Punjabi are the second official language of the NCT. Delhi has become the fastest growing cities of the world due to the high rate of immigration.


