Kåre Jostein Simonsen (born March 26, 1948) is a Norwegian bandoneonist.
He has been a regular member of the Tango Concertino and Trio Troika in Trondheim, and now plays in ensembles Quinteto Nidaros (piazzollaquintet - bandoneon, violin, electric guitar, piano and double bass) and Cholo tango duet/trio.