Jussi Chydenius (born 1972, Helsinki) is a Finnish bass singer, composer and arranger, best known as a founding member of the a cappella ensemble Rajaton since 1997. Before Rajaton he played drums in the rock band Don Huonot; he is also the son of composer Kaj Chydenius. His choral compositions are published by Oxford University Press and Sulasol, and are performed by ensembles across Europe and North America.
Chydenius was elected as the new chairman of the Konserttikeskus board in April 2026.
Rajaton performed at the Oulainen Music Week in October 2024, presenting both fan favourites and new compositions.
Rajaton performed an outdoor summer concert at Pyhtää Cultural Centre in July 2024.
Rajaton's album 'Tuhansien laulujen maa' became the first a cappella album to reach #1 on the Finnish official album chart.
