China – 1.43 Billion

The crown of the world's most populous country lies in China. Nearly 20% of the world's population, or 18.59%, live within its borders. The total area is 9,388,211 km² and the population density is 153 people per km². The majority of China's population live in large cities such as Shanghai and Beijing, with an average age of 37 years.

Beijing, the capital, has a population of about 11,716,620, while Shanghai, China's largest city, has a population of 22,315,474. Growth in China's demographic has slowed significantly since the introduction of the one-child policy. The population is expected to continue declining.

For now, we just have to wait and see what happens. India is keen to claim the title of the world's most populous country.