Ulf Karl Erik Wakenius (born 16 April 1958 in Halmstad, Sweden) is a Swedish jazz guitarist. Wakenius was a member of the Oscar Peterson quartet from 1997. He was also a member of the Ray Brown trio. Wakenius also plays with his own band, and has recorded many albums.
In the 80s he played with Peter Almqvist in Guitars Unlimited playing, among other things, during the intermission for 600 million viewers of the Swedish International Finale of the Eurovision Song Contest in 1986. A stop in Rio de Janeiro resulted in three records with Sivuca Let's Vamos, Aquarela Do Brazil and Rendez-Vous in Rio (Sonet 1987). The cooperation with Niels-Henning Ørsted Pedersen also started this decade, and they also recorded This Is All I Ask (Verve, 1998) and Those Who Were (Verve, 1996).
His own U.W. Group released Venture (1991) with Jack DeJohnette on drums, Bill Evans and Bob Berg on saxes, Randy Brecker on trumpet, Niels Lan Doky on piano, Chris Minh Doky and Lars Danielsson on bass. The work with American musicians continued in New York Meeting with Niels Lan Doky piano, Ira Coleman bass, and Billy Hart drums.