Justus Weinreich (May 24, 1858, Kassel - January 19, 1927, Baden-Baden) was a German composer and musician (violinist and violist). He probably received his first lessons from his father Johann Georg Weinreich, an oboist serving in the Elector's personal bodyguard regiment. After 1873, Weinreich worked as second violin in Kassel's court theater orchestra. Years of traveling followed. From 1876 to 1878 he worked as 1st violinist in Bonn and in 1879–1880 in Königsberg. Weinreich then moved to Baden-Baden. At the beginning of 1883 he joined the Karlsruhe court orchestra as a viola player, rising in 1885 to court musician, in 1893 to 3rd solo viola, and in 1914 to chamber musician. From 1890 to 1923 was solo violist of Badische Staatskapelle, Karlsruhe (Baden State Symphony Orchestra; founded