Marguerite Vivian Young (August 26, 1908 – November 17, 1995) was an American novelist and academic. She is best known for her novel Miss MacIntosh, My Darling. In her later years, she was known for teaching creative writing and as a mentor to young authors. "She was a respected literary figure as well as a cherished Greenwich Village eccentric." During her lifetime, Young wrote two books of poetry, two historical studies, one collection of short stories, one novel, and one collection of essays.
Young was born in Indianapolis, Indiana. Through her father, Chester Ellis Young, she was a collateral descendant of Brigham Young, and by her mother, Fay Herron Knight, she was a direct descendant of John Knox.
Young's parents separated when she was very young, and she and her sister, Naomi, were brought up by their maternal grandmother, Marguerite Herron Knight, who was convinced the child Marguerite was the reincarnation of her dead cousin, Little Harry. Her grandmother nurtured Young's love of literature.