Jacob's Room is the third novel by Virginia Woolf, first published in 1922. It centers around the life story of the protagonist Jacob Flanders, and it is presented entirely by the impressions Jacob has of other characters, and those that they have of him. The book is primarily a character study, and has little in the way of plot or background.

Set in pre-war England, Jacob's story starts when he is still a child, and the novel follows him through college at Cambridge, and then into adulthood. His time in London forms a large part of the story, though towards the end of the novel he travels to Greece. He eventually dies in the war, and instead of describing his death, Woolf describes the empty room that he left behind.

The novel is a departure from her earlier two novels, The Voyage Out (1915) and Night and Day (1919), which are more conventional. The book is seen as an important modernist text. The experimental form of the book suggests that this is where Woolf started to develop her own innovative writing style.