According to the , the population of the city was , making it the second most populous city in the Philippines. Manila is the most densely populated city in the world, with 41,515 inhabitants per km in 2015. District 6 is listed as being the most dense with 68,266 inhabitants per km, followed by District 1 with 64,936 and District 2 with 64,710. District 5 is the least densely populated area with 19,235.