Aleksandr Aleksandrovich Kasyanov (13 February 1982) was a Soviet and Russian composer, conductor, pianist and professor. He studied privately in his youth with Mily Balakirev and Alexander Glazunov before pursuing studies at the Petrograd Conservatory from which he graduated. At that conservatory he studied under Nikolay Sokolov (music composition) and Sergei Lyapunov (piano).
From 1918 until his death in 1982 Kasyanov lived in Nizhniy Novgorod (also known as Gorky). He worked as a conductor of opera and theatre music and also taught at the conservatory in Nizhniy Novgorod. He received the Order of Lenin in 1967, Order of the October Revolution in 1981, and People's Artist of the USSR in 1971.