The urban population accounts for more than half of all people worldwide, having outnumbered the rural population for the first time in 2007. Of the global urban population of 4.2 billion, 60 percent—2.6 billion people—reside in large cities with more than 300,000 people. That number is projected to increase to 3.3 billion by 2035. The number of these large cities has grown from 355 in 1955 to 1,861 today.
Source:The Atlas of Sustainable Development Goals 2020 (worldbank.org)
