Baby 81 is an album by Black Rebel Motorcycle Club. It is their fourth studio album and was released on April 30, 2007 in Europe and on May 1, 2007 in the U.S.. The album features a harder, more raw sound compared with their previous record Howl. It was also a studio comeback for drummer Nick Jago who was unable to participate during the recordings of Howl (other than the last track recorded during the sessions, 'Promise'). A DualDisc edition of the album was set to be released on May 1 in the U.S.; however, it has since been canceled.

The album debuted at number 46 on the U.S. Billboard 200, selling about 14,000 copies in its first week.

The album title refers to Baby 81, a survivor of the 2004 Indian Ocean earthquake.

The track "Weapon Of Choice" is featured in the bonus setlist in Guitar Hero: World Tour and as downloadable content for Rock Band.