Alexander Alexandrovich Kopylov or Kopilov[1] (Александр Александрович Копылов, 14 July 1854 – 20 February 1911) was a composer and violinist from the Russian Empire.
Kopylov studied for many years as a chorister and violinist in the Imperial Court Choir, where he would later teach for much of his life.
He was unable to gain entrance to either of the major conservatories in Russia, but was nevertheless able to study composition privately with Nikolai Rimsky-Korsakov and Anatoly Liadov.
A copy of his String Quartet No.2 in F, Op.23 (published by Belyayev in 1894), which is conserved at the Cornell University Library, has notations in the margin of the first violin part from a performance with Eugène Ysaÿe.
Kopylov's Symphony in C minor (Op.14) and Concert Overture (Op.31) have been recorded, as have his contributions to some of the Belyayev circle's projects (such as Les Vendredis).