Emil Szymon Młynarski (18 July 1870 – 5 April 1935) was a Polish conductor, violinist, composer, and pedagogue.

Młynarski was born in Kibarty (Kybartai), Russian Empire, now in Lithuania. He studied violin with Leopold Auer, and composition with Anatoly Lyadov and Nikolai Rimsky-Korsakov. He was the founding conductor of the Warsaw Philharmonic Orchestra and subsequently served as principal conductor of the Scottish Orchestra in Glasgow from 1910 to 1916. He conducted the premiere of Karol Szymanowski's opera King Roger.

He composed, among other things, a symphony dedicated to his homeland (Symphony in F major, Op. 14, Polonia), and two violin concertos (1897, 1917). The latter concerto, in D major, Op. 16, has been recorded by Konstanty Kulka and Nigel Kennedy.

Emil Młynarski died in Warsaw at age 64. His daughter Aniela (Nela, Nelly) married Mieczysław Munz and later Arthur Rubinstein. He is the grandfather of John Rubinstein and the great-grandfather of Michael Weston, both American actors. He is closely related to the famous Polish poet and singer Wojciech Młynarski (born 1941) and his daughter Agata Młynarska (born 1965), a Polish celebrity TV journalist.