Jussi Chydenius (born 30 December 1972) is a Finnish musician and composer. He is best known for singing bass in the vocal ensemble Rajaton.
He is the son of composer Kaj Chydenius and director . His brother is music producer . He played drums for the rock band Don Huonot from 1989 to 2001 and was a founding member. He also starred in the sketch comedy show Vintiöt. Chydenius was elected at the City Council of Helsinki in 2001 where he is also a member of the Cultural Board.
In a review of a recent Rajaton concert, one writer noted that Chydenius, "sounds like a double-bass or creates an entire drum corps, realistically snapping out a snare drum rhythm and rolling it off into silence." Of the group, he noted, "Cymbals splash from everywhere in the group as needed but all these effects, marvellously, reach a pared-down level of subtlety which is neither under- nor over-done. The tiniest vocal inflection is inserted precisely in place, not studied, but spontaneous."