ER season 12

ER
Season 12
DVD cover
Starring	Goran Visnjic Maura Tierney Mekhi Phifer Sherry Stringfield Parminder Nagra Linda Cardellini Shane West Scott Grimes Laura Innes
No. of episodes	22
Release
Original network	NBC
Original release	September 22, 2005 (2005-09-22) – May 18, 2006 (2006-05-18)
Season chronology
← Previous Season 11 Next → Season 13
List of episodes

The twelfth season of the American fictional drama television series ER first aired on September 22, 2005, and concluded on May 18, 2006. It consists of 22 episodes.