Marion Dietrich (1926–1974) was a pilot and one of the Mercury 13 who underwent the same NASA testing in the early 1960s as the Mercury 7 astronauts. Born in San Francisco in 1926, Dietrich was the daughter of Richard Dietrich, who worked in the import business, and his wife, Marion. Dietrich began flying at an early age, getting a student pilot certificate at age 16. She and identical twin sister Janet Dietrich were the only girls in an aviation class at Burlingame High School. Dietrich died in 1974 from cancer.