Spleen United is a Danish eletronick rock band. It was formed in Århus, Denmark in 2002.

With an underlying tone of warm romanticism and a musical approach that can be down and dirty, hard rocking, melodious and experimental, Spleen United sounds like no other band in Denmark today. They have replaced bass and guitar with synthesizers on many of the tracks, and they insist on playing synthesizers as if they were guitars, lending an organic feel to the electronic aspects of the album. In other words, Spleen United have their own unique approach to music.

Spleen United consists of brothers Bjarke Niemann and Gaute Niemann, Kasper Nørlund and Rune Wehner. Jens Kinch left the band in early 2008. He was replaced by Janus Nevel Ringsted.