Which city is biger London or Tehran?

Tehran is bigger than London in terms of land area, but London has a larger population. Tehran has a land area of approximately 730 square miles (1,900 square kilometers), while London has an area of about 607 square miles (1,572 square kilometers). However, London has a population of over 8.9 million people, while Tehran has a population of about 8.8 million people.