The Code of the Woosters is a novel by P. G. Wodehouse, first published on 7 October 1938, in the United Kingdom by Herbert Jenkins, London, and in the United States by Doubleday, Doran, New York. It was serialised in The Saturday Evening Post (US) from 16 July to 3 September 1938 and in the London Daily Mail from 14 September to 6 October 1938.

The Code of the Woosters is the third full-length novel to feature two of Wodehouse's best-known creations, Bertie Wooster and his valet Jeeves. It introduces Sir Watkyn Bassett, the owner of a country house called Totleigh Towers where the story takes place, and his intimidating friend Roderick Spode. It is also a sequel to Right Ho, Jeeves, continuing the story of Bertie's newt-fancying friend Gussie Fink-Nottle and Gussie's droopy and overly sentimental fiancée, Madeline Bassett.

Bertie and Jeeves return to Totleigh Towers in a later novel, Stiff Upper Lip, Jeeves.