Siri Hustvedt (born February 19, 1955) is an American novelist, essayist, and poet. Hustvedt was born in Northfield, Minnesota. Her father Lloyd Hustvedt was a professor of Scandinavian literature, and her mother Ester Vegan emigrated from Norway at the age of thirty. She holds a B.A. in history from St. Olaf College and a Ph.D. in English from Columbia University; her thesis on Charles Dickens was entitled Figures of Dust: A Reading of Our Mutual Friend.

Hustvedt has mainly made her name as a novelist, but she has also produced a book of poetry, and has had short stories and essays on various subjects published in (among others) The Art of the Essay, 1999, The Best American Short Stories, 1990 and 1991, The Paris Review, Yale Review, and Modern Painters.

She lives in Brooklyn, New York, with her husband, writer Paul Auster, and their daughter, singer and actress Sophie Auster.