Jaroslav Kocian (Ústí nad Orlicí, 22 February 1883 – Prague, 8 March 1950) was a Czech violinist, classical composer and teacher.
He studied in Prague under Otakar Ševčík, and is considered together with Jan Kubelík as the most important representative of "Ševčík´s school".
An interpreter of violin compositions of Johann Sebastian Bach. He is especially noted for his compositions for the violin, which have been recorded most often by his student Josef Suk.
He taught at the Prague Conservatory.