Marguerite Henry (née Breithaupt; 13 April 1902 – 26 November 1997) was an American writer of children's books, writing fifty-nine books based on true stories of horses and other animals. She won the Newbery Medal for King of the Wind, a 1948 book about horses, and she was a runner-up for two others. One of the latter, Misty of Chincoteague (1947), was the basis for several related titles and the 1961 movie Misty.