Elizabeth Curtis Sittenfeld (born 1975) is an American writer.
She is the author of a collection of short stories as well as five novels: Prep, the tale of a Massachusetts prep school; The Man of My Dreams, a coming-of-age novel and an examination of romantic love; American Wife, a fictional story loosely based on the life of First Lady Laura Bush; Sisterland, which tells the story of identical twins with psychic powers; and Eligible, a modern-day Pride and Prejudice.