How old is Minecraft?

minecraft was created by Mojang or more specifically, Markus "Notch" Persson and Jens "Jeb" Bergersten. It was officially released on November 18, 2011 on PC and on May 9, 2012 on XBox. In May 17, 2009, it was released in "Alpha" and in "Beta" on December 20, 2011 for players to find out the bugs.

To answer your question, Minecraft is approximately 3 years old in 2013.