get a feel for relative sizes of these places, I use the same map scale and line them up. Hong Kong (population: 6,898,686, density: 6,254/km²) Perth (population: 1,433,217, density: 203/km², my calculation from here .) Singapore (population: 4,425,720, density: 6,389/km²) Taipei (population 2,625,512, density: 9,660/km²) Posted by jeffyen at 11:49 AM