Mapping Facebook’s Growth Over Time
Using Google’s new Insights for Search tool, Inside Facebook has mapped Facebook’s US and international search growth over time from its launch in February 2004 to the present. Note that while these are not visits, searches and visits do generally correlate.
United States
April 2004
Facebook launches in February 2004 at Harvard University in Massachusetts.

June 2004
It then opens to other Ivy league schools and Stanford University in California.