In what year was Facebook founded?

Facebook was founded in 2004. Mark Zuckerberg launched the service on February 4, 2004, while he was a student at Harvard College, with fellow students Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes involved in its early development.

The site initially served only Harvard students and then expanded to other universities, including Stanford, Columbia, and Yale. It moved its operations to Palo Alto, California, later in 2004, helping place the company in Silicon Valley's technology ecosystem.

A common mix-up is 2003, the year Zuckerberg created Facemash, an earlier Harvard project that compared students' photographs. Facebook itself came afterward. Another neighboring date is 2005, when the company dropped “The” from its name and became Facebook.