Raymond Radiguet (French: [ʁɛmɔ̃ ʁadiɡɛ]; 18 June 1903 – 12 December 1923) was a French novelist and poet. He completed his best-known novel, Le Diable au corps (1923), at the age of seventeen. A succès de scandale upon its publication, Le Diable au corps is a semi-autobiographical account of an affair with the wife of a soldier during World War I. A second novel, Le Bal du comte d'Orgel (1924), was published posthumously.

Radiguet associated with many of the important artists and artistic movements of his time, notably forming an intense and possibly romantic relationship with Jean Cocteau. Radiguet died unexpectedly at the age of twenty of typhoid fever.

Raymond Maurice Radiguet was born in Saint-Maur-des-Fossés, Val-de-Marne, close to Paris. He was the eldest of the surviving children born to Maurice Radiguet [fr] (1866-1941), a successful caricaturist, and Marie Radiguet (née Tournier, 1884-1958), who taught at a boarding school. When asked about his mother, Radiguet once said, "Je ne sais pas. Je ne vois jamais son visage. Elle est toujours baissée, en train de relacer les souliers d'un de mes frères et sœurs." [transl. "I don't know. I never see her face. She's always looking down as she ties the shoes of one of my brothers or sisters."] His father was a much more significant presence in his life, and Maurice Radiguet's mixture of permissiveness and near-rivalry with his eldest son heavily influenced the paternal dynamic in Le Diable au corps. Radiguet was also close with his paternal aunt, Eugénie Cordonnier, who provided a steady and sensible presence in the life of the family.

On his mother's side, his family hailed from Martinique; his maternal grandfather had died in a shipwreck off the coast of Havana. Radiguet's lifelong fascination with the French West Indies influenced his characterization of Mahaut in Le Bal du comte d'Orgel. It has been further suggested that his mother's fear of water, stemming from her father's death, was at the origin of Radiguet's poetic preoccupation with the ocean. Cocteau claimed that Marie Radiguet's origins explained the temperament of her son, who "dort le jour, fume et aime le sucre." [transl. "sleeps during the day, smokes and loves sugar."]

Radiguet's paternal relatives were mainly involved in the sciences. His great-grandfather had founded Radiguet & Fils, a company that manufactured precision scientific instruments. The management of this firm stayed in the family for several generations. A notable relative was Arthur Radiguet [fr] (1850-1905), head of Radiguet & Fils and innovator in the field of radiography, who died of radiodermatitis in one of the first such cases observed in France.

Radiguet recounted his earliest memory in the autobiographical Île de France, Île d'Amour:

Je me vois à deux ans mené par ma nourrice tous les matins dans la pension de jeunes filles, d'où ma mère était sortie quatre ans auparavant. La douce tiédeur des genoux, des seins, je ne l'ai jamais retrouvée depuis, comme à ce moment où ces caresses, je les sentais si différentes de celles de ma mère ou de ma nourrice.

[I see myself at two years old, led by my nurse every morning to the girls' boarding school from which my mother had graduated four years earlier. The gentle warmth of knees, of breasts, I have never been able to recover it since, as at that moment when I felt those caresses were so different from those of my mother or my nurse.]