Charles-Alexandre (Alexandre-Charles) Fessy (October 18, 1804 – November 30, 1856) was a French organist and composer.
He entered the Paris Conservatory in 1813 studying harmony and piano.
The following year he exchanged position with Lefébure-Wély the organist of Saint-Roch.
Fessy stayed at Saint-Roch until his death in 1856.
Apart from being an organist he also served as the conductor of the 5th Legion of the National Guard in Paris.