Dark Horse is the sixth studio album by the Canadian rock band Nickelback, released on November 17, 2008, in Europe and a day later elsewhere. It is the follow-up to their multi-platinum selling All the Right Reasons (2005). It was co-produced by the band and producer and songwriter Robert John "Mutt" Lange, known for working with such acts as Foreigner, AC/DC, Bryan Adams, Def Leppard and Shania Twain. Dark Horse sold 326,000 in its first week and debuted at number 2 in the US. More than a year after its release, the album did not leave the Top 100 on the Billboard 200. In its 91st week, the album peaked at #46 on the latest issue, on the week of August 28, 2010. On 9 October, the album has since stayed there for 97 consecutive weeks, in the position of #71. The album spent 125 consecutive weeks inside the Billboard 200. On the week of November 29, 2014 Dark Horse re-entered the Billboard 200 at #195, more than six years after the album's release.

It was ranked #191 on Billboard‍ '​s 200 Albums of the Decade. It is also the band's fourth straight Multi-Platinum selling album in the U.S. As of 2010 the album has sold 3 million copies in the United States and 5 million copies worldwide.