Mrs. Dalloway (published on 14 May 1925) is a novel by Virginia Woolf that details a day in the life of Clarissa Dalloway in post-World War I England. It is one of Woolf's best-known novels.

Created from two short stories, "Mrs. Dalloway in Bond Street" and the unfinished "The Prime Minister", the novel's story is of Clarissa's preparations for a party of which she is to be hostess. With the interior perspective of the novel, the story travels forwards and back in time and in and out of the characters' minds to construct an image of Clarissa's life and of the inter-war social structure.

In 2005 the novel was chosen by TIME magazine as one of the one hundred best English-language novels from 1923 to present.

Margaret Drabble's novel The Middle Ground (1980) contains several allusions to Mrs. Dalloway.