Mary Edith Fly (c. 1847–1925) was a late 19th and early 20th century American photographer who co-founded and managed Fly's Photography Gallery in Tombstone, Arizona, with her husband, photographer C.S. "Buck" Fly. She ran the studio alone after his death in 1901. There were few women photographers in this period, and her contributions were recognized in 1989 when she was inducted into the Arizona Women's Hall of Fame.