Ruben Yttergård Jenssen (born 4 May 1988) is a Norwegian footballer who plays as a midfielder for Eliteserien club Brann, and the Norwegian national team.
He was playing regularly for Tromsø in the Tippeligaen since 2008, and became one of the team's most important players before transferring to Kaiserslautern.
Early in his career, Jenssen played as a winger, but he has later played as a central midfielder.
Jenssen made his international debut for Norway in May 2010, and has since then been a member of the national team squad, and a regular starter since September 2012.