Jean Reinhardt (23 January 1910 – 16 May 1953), known by his Romani nickname Django (French: [dʒãŋɡo ʁɛjnaʁt] or [dʒɑ̃ɡo ʁenɑʁt]), was a Belgian-born Romani jazz guitarist and composer who lived most of his life in France. He was one of the first major jazz talents to emerge in Europe and has been hailed as one of its most significant exponents.

With violinist Stéphane Grappelli, Reinhardt formed the Paris-based Quintette du Hot Club de France in 1934. The group was among the first to play jazz that featured the guitar as a lead instrument. Reinhardt recorded in France with many visiting American musicians, including Coleman Hawkins and Benny Carter, and briefly toured the United States with Duke Ellington's orchestra in 1946. He died suddenly of a brain hemorrhage in 1953 at the age of 43.

Reinhardt's most popular compositions have become standards within gypsy jazz, including "Minor Swing", "Daphne", "Belleville", "Djangology", "Swing '42", and "Nuages". The jazz guitarist Frank Vignola said that nearly every major popular music guitarist in the world has been influenced by Reinhardt. Over the last few decades, annual Django festivals have been held throughout Europe and the U.S., and a biography has been written about his life. In February 2017, the Berlin International Film Festival held the world premiere of the French biographical film Django, based on Reinhardt's life.

Reinhardt was born on 23 January 1910 in Liberchies, Pont-à-Celles, Belgium, into a French family of Manouche Romani descent. His French, Alsatian father, Jean Eugene Weiss, domiciled in Paris with his wife, went by Jean-Baptiste Reinhardt, his wife's surname, to avoid French military conscription. His mother, Laurence Reinhardt, was a dancer. The birth certificate refers to "Jean Reinhart, son of Jean Baptiste Reinhart, artist, and Laurence Reinhart, housewife, domiciled in Paris".

A number of authors have repeated the suggestion that Reinhardt's nickname, Django, is Romani for "I awake"; it may also simply have been a diminutive, or local Walloon version, of "Jean". Reinhardt spent most of his youth in Romani encampments close to Paris, where he started playing the violin, banjo and guitar. He became adept at stealing chickens. His father reportedly played music in a family band comprising himself and seven brothers; a surviving photograph shows this band including his father on piano.

Reinhardt was attracted to music at an early age, first playing the violin. At the age of 12, he received a banjo-guitar as a gift. He quickly taught himself to play, mimicking the fingerings of musicians he watched, who would have included local virtuoso players of the day such as Jean "Poulette" Castro and Auguste "Gusti" Malha, as well as from his uncle Guiligou, who played violin, banjo and guitar. Reinhardt was able to make a living playing music by the time he was 15, busking in cafés, often with his brother Joseph. At this time, he had not started playing jazz, although he had probably heard and had been intrigued by the version of jazz played by American expatriate bands like Billy Arnold's.

Reinhardt received little formal education and acquired the rudiments of literacy only in adult life.

At the age of 17, Reinhardt married Florine "Bella" Mayer, a girl from the same Romani settlement, according to Romani custom (although not an official marriage under French law). The following year he recorded for the first time. On these recordings, made in 1928, Reinhardt plays the "banjo" (actually the banjo-guitar) accompanying the accordionists Maurice Alexander, Jean Vaissade and Victor Marceau, and the singer Maurice Chaumel. His name was now drawing international attention, such as from British bandleader Jack Hylton, who came to France just to hear him play. Hylton offered him a job on the spot, and Reinhardt accepted.