Mary M. Duggan (March 22, 1921 – March 6, 2009) was an American children's book author.

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She was born in 1921 in Belleview, Missouri. Her father was a teacher and local government official. She attended the University of Arizona. On March 13, 1941, she married M. P. Turney, a mining engineer. She had one daughter with him. They later divorced, and, on May 9, 1946, she married Auty W. Duggan, with whom she had three daughters. She was a member of the Church of Scientology.^[1]

She was an artist, including water colors, and an author. Her works include Old Hawk's Gold, published by Steck in 1966.^[1]