Mary A. G. Dight (November 7, 1860 – February 8, 1923) was an American physician. She served as president of the Hempstead Academy of Medicine, had charge of the Woman's Hospital of Philadelphia, and was the pioneer in pursuing the establishment of a woman's medical college in New Orleans. At least during her marriage to Charles Fremont Dight, she was a supporter of the human eugenics movement.