 Currently, 757 million humans live in the 101 largest cities; these cities are home to 11% of the world's population.By the end of the century, the world population is projected to grow, with estimates ranging from 6.9 billion to 13.1 billion; the percentage of people living in the 101 largest cities is estimated to be 15% to 23%.The following 101 metropolitan areas with the largest population projections for the years 2025, 2050, 2075, and 2100 are listed below.