This video shows the top 20 countries with most population from 1900 to 2100 based on UN World Population Prospects 2019. These statistics are based on the populations in the regions of countries that exists today, some of these areas belonged to different countries in the past.br br According to UN World Population Prospects, the top 10 countries with most population in the year of 2100:br br #1. India: 1,447,025,612br #2. China: 1,064,993,457br #3. Nigeria: 732,941,596br #4. United States of America: 433,853,891br #5. Pakistan: 403,102,827br #6. D.R. Congo: 362,031,082br #7. Indonesia: 320,782,426br #8. Ethiopia: 294,392,903br #9. Tanzania: 285,651,846br #10.