Julius Klengel (24 September 1859 – 27 October 1933) was a German cellist who is most famous for his etudes and solo pieces written for the instrument.
He was the brother of Paul Klengel.
A member of the Gewandhaus Orchestra at fifteen, he toured extensively throughout Europe as cellist and soloist of the Gewandhaus Quartet.
His pupils include Emanuel Feuermann, Gregor Piatigorsky and Alexandre Barjansky.
See: List of music students by teacher: K to M#Julius Klengel.