His most notable works include ballets Coppélia (1870) and Sylvia (1876) as well as the operas Le roi l'a dit (1873) and Lakmé (1883). Some musicologists believe that the ballet in Gounod's Faust was actually composed by Delibes. He died in Paris from natural causes on 16 January 1891, at the age of 54. He was buried in the Cimetière de Montmartre in Paris.
Léo Delibes was born in Saint-Germain-du-Val, now part of La Flèche (Sarthe), France, in 1836. His father was a mailman, his mother a talented amateur musician. His grandfather had been an opera singer. He was raised mainly by his mother and uncle following his father's early death. In 1871, at the age of 35, the composer married Léontine Estelle Denain. His brother Michel Delibes migrated to Spain; he was the grandfather of Spanish writer Miguel Delibes.
Starting in 1847, Delibes studied composition at the Paris Conservatoire as a student of Adolphe Adam. A year later he began taking voice lessons, though he would end up a much better organ player than singer. He held positions as a rehearsal accompanist and chorus master at the Théâtre Lyrique, as second chorus master at the Paris Opéra (in 1864), and as organist at Saint-Pierre-de-Chaillot (1865–71). The first of his many operettas was Deux sous de charbon, ou Le suicide de Bigorneau ("Two sous-worth of coal"), written in 1856 for the Folies-Nouvelles.
A ceremonial cantata, Algers, for Napoleon III on the theme of Algiers, brought him to official attention; a collaboration with Léon Minkus resulted, in which his contribution of an act's worth of musical numbers for a ballet La source (1866) brought him into the milieu of ballet. In 1867 Delibes composed the divertissement Le jardin animé for a revival of the Joseph Mazilier/Adolphe Adam ballet Le corsaire. He wrote a mass, his Messe brève, and composed operettas almost yearly and occasional music for the theater, such as dances and antique airs for Victor Hugo's Le roi s'amuse, the play that Verdi turned into Rigoletto.
Delibes achieved true fame in 1870 with the success of his ballet Coppélia; its title referred to a mechanical dancing doll that distracts a village swain from his beloved and appears to come to life. His other ballet is Sylvia (1876).