We’ve been granularly tracking Facebook’s Growth since October 2007, which at the time it had a mere 20 million US users. Today it has over 103 million US based users. The following data shows the growth rates of various user bases in Facebook over the one year period from 1/4/2009 to 1/4/2010. All data comes directly from Facebook’s Social Ads system:


Key Insights:

  1. Facebook’s US user base grew from 42 million to 103 million in 2009. That’s a 144.9% growth rate!
  2. The 35+ demographic now represents more than 30% of the entire user base.
  3. The 55+ audience grew a whopping 922.7% in 2009.
  4. Atlanta had the highest growth rate in 2009 at 267.6%

You can download an excel spreadsheet of this data here