The Reef is a 1912 novel by American writer Edith Wharton. It was published by D. Appleton & Company. It concerns a romance between a widow and her former lover. The novel takes place in Paris and rural France, but primarily features American characters. While writing the novel, Edith Wharton visited England, Sicily, and Germany, among other locations.

Edith Wharton (born Edith Newbold Jones; January 24, 1862–August 11, 1937) was a Pulitzer Prize-winning American novelist, short story writer, and designer. She was nominated for the Nobel Prize in Literature in 1927, 1928 and 1930. Wharton combined her insider's view of America's privileged classes with a brilliant, natural wit to write humorous, incisive novels and short stories of social and psychological insight. She was well acquainted with many of her era's other literary and public figures, including Theodore Roosevelt.