Weir of Hermiston (1896) is an unfinished novel by Robert Louis Stevenson. It is markedly different from his previous works in style and has often been praised as a potential masterpiece. It was cut short by Stevenson's sudden death in 1894 from a cerebral hemorrhage. The novel is set at the time of the Napoleonic Wars.

The novel tells the story of Archie Weir, a youth born into an upper-class Edinburgh family. Because of his Romantic sensibilities and sensitivity, Archie is estranged from his father, who is depicted as the coarse and cruel judge of a criminal court. By mutual consent, Archie is banished from his family of origin and sent to live as the local laird on a family property in the vicinity of the Borders hamlet Hermiston.

While serving as the laird, Archie meets and falls in love with Kirstie (Christina). As the two are deepening their relationship, the book breaks off. Confusingly, there are two characters in the novel called Christina, the younger of whom is Archie's sweetheart.

The novel is presented as the memoir of one Ephraim Mackellar, steward of the Durrisdeer estate in Scotland. The novel opens in 1745, the year of the Jacobite rising. When Bonnie Prince Charlie raises the banner of the Stuarts, the Durie family—the Laird of Durrisdeer, his older son James Durie (the Master of Ballantrae) and his younger son Henry Durie—decide on a common strategy: one son will join the uprising while the other will join the loyalists. That way, whichever side wins, the family's noble status and estate will be preserved. Logically, the younger son should join the rebels, but the Master insists on being the rebel (a more exciting choice) and contemptuously accuses Henry of trying to usurp his place, comparing him to Jacob. The two sons agree to toss a coin to determine who goes. The Master wins and departs to join the Rising, while Henry remains in support of King George II.

The Rising fails and the Master is reported dead. Henry becomes the heir to the estate, though he does not assume his brother's title of Master. At the insistence of the Laird (their father) the Master's heartbroken fiancée marries Henry to repair the Durie fortunes. Some years pass, during which Henry is unfairly vilified by the townspeople for betraying the rising. He is treated with complete indifference by his family, since his wife and his father both spend their time mourning the fallen favourite. The mild-tempered Henry bears the injustice quietly, even sending money to support his brother's abandoned mistress, who abuses him foully, and her child, whom she claims is his brother's bastard.