Justus Johann Friedrich Dotzauer (20 January 1783 – 6 March 1860) was a German cellist and composer.
In early years he played piano, violin and cello, also horn and clarinet, and studied theory and composition with the organist Johann Caspar Rüttinger [de], a pupil of Johann Christian Kittel.
With Heinrich August Matthaei, Bartolomeo Campagnoli and Johann Georg Hermann Voigt, Dotzauer was a founder of the Gewandhaus Quartet.
He was a noted teacher, his students including Friedrich August Kummer and Karl Drechsler.
[3] Dotzauer composed many studies and exercises for solo cello; other compositions include masses and other church music, an opera, 9 cello concertos, and chamber music including string quartets.