Name this small, important island adjacent to the mainland of China. It has an area of 23 square miles and it one of the most densely populated places on earth with 247,500 people per square mile.
The answer is: Hong Kong. For comparison purposes, here are the population densities per square mile of some other cities around the world. Lagos, Nigera –142, 821; Dhaka, Bangladesh– 138,108; Jakarta, Indonesia — 130,026; Mumbai, India –127, 461; Seoul, South Korea — 49,101; Sao Paulo, Brazil — 41, 466; Mexico City, Mexico–40,037; and New York City, United States — 11, 480.