Margaret Elizabeth Sangster (1838-1912) was an American poet, author, and editor. She was popular in the late 19th and early 20th century.
Sangster was the daughter of John Munson of Ireland and Margaret Chisholm of New York. Her father was in the marble industry in New York City. Margaret and her younger sister Isabell grew up in a very religious household and the two sisters were well educated.
Sangster eventually became an editor at Harper’s Bazaar. Through her work she became acquainted with notable people of her age, including Mark Twain and Helen Keller. Other than Harper’s Bazaar, she contributed to Ladies' Home Journal, Hearth and Home, and the Christian Intelligencer.