Season 1 (26 episodes) aired from April 7 to October 27, 2008.
Season 2 (26 episodes) aired from October 7, 2008 to March 30, 2009.
The series also has two OVAs:
* Vampire Knight: The Abduction (released on September 18, 2008)
* Vampire Knight: Guilty (released on March 17, 2009)