Manila is the capital and second-largest city of the Philippines and one of 16 cities that comprise Metro Manila, which has an overall population of 12.8 million per the 2015 Census. The city of Manila has a population of 1.78 million in 2016, according to census data.
Manila is the world's most densely populated city with 42,857 people per square kilometer, or 111,002 people per square mile. This is all contained within an area of 42.88 square kilometers (16.56 square miles).
The Metro Manila population is estimated at 12 million but the larger urban area has a population estimated at 21.3 million. The Metro Manila population swells during the daytime, however, to about 15 million. This density is much higher than that of Mumbai (23,000 people/sq km), Paris (20,150 people/sq km), and Toyko (10,100 people/sq km).
The most recent census found that Tondo has become the most populous district, accounting for 38% of the total population, followed by Sampaloc (20.7%) and Santa Ana (10.7%).