Top 10 Biggest Cities in the World

mexico city worlds biggest cities
6. Mexico City – 23,500,000 - Mexico’s capital takes the number six spot on our list, but it’s actually tied with Delhi, as it is hard to confirm which city is slightly bigger. It is the most important political, cultural, educational and financial center of Mexico. It isn’t a part of any of the 31 Mexican states, but instead belongs to the federation as a whole.