As of October 4th, 2012 In October 2012, the countries with the most Facebook users were
United States with 166.1 million members
Brazil with 58.4 million members
India with 55.3 million members
Indonesia with 47.5 million members
Mexico with 38.3 million members
Facebook has finally reached the much vaunted and much anticipated
number of one billion users and has become the most used website in the world today with 1 billion users and counting.Another important statistics published on Facebook corporate division show that there are 140 billion are the total friends network a t the site
Facebook took 163 days to reach 1000 million from 900 million users ,
while it took 4 years ( 3 years and 10 months) to reach1000 million
or 1 billion users.