Einherjer is a Viking metal band from Haugesund, Norway, founded in 1993. Some of the band's albums are heavily folk influenced, while others have a more traditional symphonic black metal sound. Their lyrics retell Norse legends, and each of their albums has its own theme. The band split up in early 2004 after releasing the album Blot in December 2003, but later reformed.

Viking metal is a subgenre of heavy metal music characterized by a lyrical and thematic focus on Norse mythology, Norse paganism, and the Viking Age. Viking metal is quite diverse as a musical style, to the point where some consider it more a cross-genre term than a genre, but it is typically seen as black metal with influences from Nordic folk music. Common traits include a slow-paced and heavy riffing style, anthemic choruses, use of both sung and harsh vocals, a reliance on folk instrumentation, and often the use of keyboards for atmospheric effect.