This statistic shows a timeline with the worldwide number of active Facebook users from 2008 to 2013. In the third quarter of 2008, the number of active Facebook users was 100 million, while in first quarter of 2009, this number had almost doubled. It grew continuously throughout the years, with approximately 845 million active users in December 2012. Active users are those which have logged in to Facebook during the last 30 days. Furthermore, as of third quarter of 2012, the social network had 600 million mobile MAU.