Population density
With a population of 1,660,714 and a land area of 38.55 km², Manila has one of the highest population densities of any major city in the world with 43,079 people/km². District 6 is listed as being the most dense with 68,266, followed by the first two districts (Tondo) with 64,936 and 64,710, respectively, and district 5 being the least dense with 19,235), and Tokyo (10,087 people/km²).

Manila's population density dwarfs that of Paris (20,164 inhabitants per km²), Buenos Aires (2,179 people/km², with its most dense inner suburb Lanus' 10,444 density), Mexico City (11,700 people/km²), Istanbul (1,878 people/km², with its most dense district Fatih's 48,173 density), Shanghai (16,364 people/km², with its most dense district of Nanshi's 56,785 density), and Tokyo (10,087 people/km²).

But when accounting for the entire urban area, Metro Manila drops to 85th place with 12,550 people/km² in a land area of 1,334 km², behind even Cebu City, which ranks 80th.

Languages
The vernacular language is Tagalog in the form of Filipino, while English is the language most widely used in education and business throughout the Metro Manila region. A number of older residents can still speak basic Spanish, which was a mandatory subject in the curriculum of Philippine universities and colleges, and many children of European, Arab, Indian, Latin American or other migrants or expatriates also speak their parents' languages at home, aside from English or Filipino for everyday use. Hokkien Chinese is spoken by the city's large Chinese-Filipino community.

Source: Wikipedia Encyclopedia