The thirteenth season of the American fictional drama television series ER first aired on September 21, 2006 and concluded on May 17, 2007. The thirteenth season consists of 23 episodes.
|Episode Runtime||00 Hours 45 Minutes|
|Episode Count On Season 13|
|Production Companies||Hands Down Entertainment, Constant c Productions, John Wells Productions, Amblin Entertainment, Warner Bros. Television, Amblin Television|