India, Brazil and Russia, along with the Middle East and Africa, are driving the biggest gains in Facebook’s worldwide user base. According to new estimates from eMarketer, Facebook will pass 1 billion active users worldwide in 2013 as the company sees particularly strong growth in its Asia-Pacific, Middle East and Africa, and Latin American user bases, with each region set to rise by about 30% or more this year. By next year, Facebook will reach 1.26 billion global users.

via Emerging Markets Drive Facebook User Growth – eMarketer.