Today, there are over 300 cities in the world that boast a population in excess of 1 million



In 133 BC, Rome, Italy was the first city to reach the population of one million inhabitants. London, England reached the mark in 1810 and New York, USA found its millionth citizen in 1875.



Currently, China has the world’s largest population (1.4 billion), followed by India (1.3 billion).