Julius Klengel (24 September 1859 – 27 October 1933) was a German cellist who is most famous for his études and solo pieces written for the instrument.

[2] There he remained for over four decades: to celebrate his fifty years of service, Wilhelm Furtwängler conducted a jubilee concert, in which Klengel played the cello part in a double concerto he composed for the occasion.

During that time period, Klengel became professor at the Leipzig Conservatory, where he was briefly a member of Adolph Brodsky's string quartet,[3] and began composing.

Of his music, the two volumes of etudes ("Technical Studies") for cello remain in the repertory; three concertos were recorded in 2000 by Christoph Richter and NDR Radiophilharmonie under Bjarte Engeset.

His students included Guilhermina Suggia,[4] Hideo Saito, Emanuel Feuermann,[5][6] Paul Grümmer, William Pleeth,[7] and Gregor Piatigorsky.