Jean Santeuil (French: [ʒɑ̃ sɑ̃tœj]) is an unfinished novel written by Marcel Proust.

The first English version, translated from the French by Gerard Hopkins, was published in 1955 by Weidenfeld & Nicolson in the UK[1] and in 1956 by Simon & Schuster in the US.

[2] It was first printed in three volumes, as the novel is over nine-hundred pages long.

The novel is referred to as a precursor to Proust's most significant work, À la recherche du temps perdu (In Search of Lost Time) both thematically and in its plot, although it is more plainly autobiographical than Proust's later works.

This includes his movement into high society within late nineteenth-century Paris and his adventures in other places, such as Illiers and Brittany.