World Population Milestones
World Population Reached …
- 1 billion in 1804
- 2 billion in 1927 (123 years later)
- 3 billion in 1960 (33 years later)
- 4 billion in 1974 (14 years later)
- 5 billion in 1987 (13 years later)
- 6 billion in 1999 (12 years later)
World Population May Reach …
- 7 billion in 2013 (14 years later)
- 8 billion in 2028 (15 years later)
- 9 billion in 2054 (26 years later)
