What Does a World With 1 Billion Facebook Users Look Like?

Facebook started the year with just under 150 million active users worldwide, crossed 300 million in September, and we estimate it’s on track to end the year with just over 375 million. It’s hard to comprehend that kind of growth, but to put it in perspective, there are only about 1.65 billion active internet users in the world. If you exclude the 350 million active internet users in China, where Facebook is blocked, that means that about 29% of the total worldwide internet population will be active Facebook users by the end of 2009.