The world's human population refers to the total amount of people on the earth, while population refers to one specific area with people. According to statistics, the top ten most overpopulated countries in order from highest to lowest include China, India, United States, Indonesia, Brazil, Pakistan, Nigeria, Bangladesh, Russia, and Mexico. China has a total population of 1.34 billion citizens.
It is speculated that as many as three million Chinese babies are concealed by their parents every year. This practice is because the country has a firm family planning policy. The United States population almost quadrupled in the 20th century, expanding from 76 million in 1900 to 308.7 million in 2010. These totals were obtained from the last census in 2010.