5 Largest Countries By Population In The World (In Million) Rate this post 5 Largest Countries By Population In The World (In Million) S. No. Name Country 1. India 1.4286 Billion 2. China 1.4250 Billion 3. U.S.A. 336.5 Million 4. Indonesia 281.8 Million 5. Pakistan 233.4 Million Source: Worldometer Sharing Is Caring: