5 Countries with Most Cities Over 1 Million

4. Mexico

Number of Cities: 21

Mexico’s population experienced substantial growth, expanding over sixfold from 1910 till the early 21st century. The rate of natural increase notably surged in the 1940s, attributable to notable advancements in healthcare standards and food provisions. Remarkable improvements led to significant reductions in both the death rate and infant mortality, though the latter remains relatively high compared to more developed nations. While the growth rate decelerated in the late 20th century, Mexico’s population continues to increase at a steady pace. Mexico City, Guadalajara and Monterrey have the largest population in Mexico, with a combined population of 33 million.