| Le roi de Lahore | |
|---|---|
| Opera by Jules Massenet | |
 Design by Philippe Chaperon for Act V | |
| Librettist | Louis Gallet |
| Language | French |
| Premiere | 27 April 1877 Palais Garnier, Paris |
Le roi de Lahore ("The king of 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 (Act I, scene 1), Auguste Alfred Rubé and Philippe Chaperon (Act I, scene 2; Act V), Louis Chéret (Act II), Jean-Baptiste Lavastre (Act III), Antoine Lavastre and Eugène Louis Carpezat (Act IV).
Le roi de Lahore is the third of Massenet's operas produced in Paris and was his first major success there, spawning performances across Europe and leading to his place as one of the most popular composers of his time.