Facebook recently announced in their F8 conference that they have now 800 million users.
Facebook’s active user base is:
2.5x the population of the United States
3.9x the population of Brazil
5.8x the population of Russia
6.3x the population of Japan
9.7x the population of Germany
12.4x the population of France
13x the population of the United Kingdom
13.8x the population of Italy
19.7x the population of Spain
23.5x the population of Canada
36.6x the population of Australia
76.7x the population of Belgium
88x the population of Sweden
144.6x the population of Denmark
185.7x the population of Ireland
Only India and China have populations larger than Facebook. (We are the champions)
Data sources: Population data from GeoHive
