Julius or Jules Conus (Russian: Юлий Эдуардович Конюс, Yuly Eduardovich Konyus; 1 February 1869 – 3 January 1942) was a Russian violinist and composer.
Conus was born in Moscow, the son of Eduard Conus, a pianist, composer and teacher of French descent born in Saratov. His mother, Klotilda (sometimes Clothilde) Adolfovna, née Tambroni, was of Italian parentage and born in St Petersburg. His brothers were the musicians Georgi Conus and Lev Conus. All three brothers studied in the Moscow Conservatory; among their teachers were Sergei Taneyev and Anton Arensky.