http://time.com/3978175/india-population-worlds-most-populous-country/

http://money.cnn.com/2015/07/30/news/economy/india-china-population/

These countries will have the largest populations in 2030:

1. India (1.53 billion)
2. China (1.45 billion)
3. United States (356 million)
4. Indonesia (295 million)
5. Nigeria (263 million)
6. Pakistan (245 million)
7. Brazil (229 million)
8. Bangladesh (186 million)
9. Mexico (148 million)
10. Russia (139 million)