Le roi de Lahore is an opera in five acts by Jules Massenet to a French libretto by Louis Gallet. It was first performed at the Palais Garnier in Paris on 27 April 1877 in costumes designed by Eugène Lacoste and settings designed by Jean Émile Daran, Auguste Alfred Rubé and Philippe Chaperon, Louis Chéret, Jean-Baptiste Lavastre, Antoine Lavastre and Eugène Louis Carpezat.

Jules Émile Frédéric Massenet was a French composer of the Romantic era best known for his operas, of which he wrote more than thirty. The two most frequently staged are Manon (1884) and Werther (1892). He also composed oratorios, ballets, orchestral works, incidental music, piano pieces, songs and other music.