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World Population Milestones

Find a list of world population milestones, from when the total world's population reached 1 billion in 1804 to 7 billion in 2011.

  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) 
  7 billion in 2011(12 years later) 

Source: United Nations Population Division

Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.

Population StatisticsTotal Population of the World by Decade, 1950–2050

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