25. Sao Paulo, Brazil
Population: 17,000,000
Land area: 1,968 sqKm
Population density: 9,000 people per sqKm

Thiago Leite/Shutterstock.com
Population: 17,000,000
Land area: 1,968 sqKm
Population density: 9,000 people per sqKm
Thiago Leite/Shutterstock.com