Edith Head (1897–1981), the Hollywood costume designer born Edith Claire Posener, won eight Academy Awards for Costume Design from 35 nominations—the highest number of Oscars won by a woman. Her eight winning films, with the YEAR OF THE OSCAR CEREMONY (rather than the year of the film's release), were:
1. 1950 — The Heiress (1949): Costume Design, Black-and-White.
2. 1951 — Samson and Delilah (1949): Costume Design, Color.
3. 1951 — All About Eve (1950): Costume Design, Black-and-White.
4. 1952 — A Place in the Sun (1951): Costume Design, Black-and-White.
5. 1954 — Roman Holiday (1953): Costume Design, Black-and-White.
6. 1955 — Sabrina (1954): Costume Design, Black-and-White.
7. 1961 — The Facts of Life (1960): Costume Design, Black-and-White.
8. 1974 — The Sting (1973): Costume Design.
Two distinct awards were presented to Head at the same 1951 ceremony: one for color costumes and one for black-and-white costumes, categories that were then judged separately. Her eighth and final win was awarded at the 46th Academy Awards on 2 April 1974, for the period costumes of The Sting. This date is the achievement date for the lifetime total of eight awards. Head's influence extended across decades at Paramount and Universal, where she shaped the screen identities of many celebrated actors. Although her birthplace and upbringing were American and Catholic, JWR classifies the record as Jewish-heritage-qualified on the basis of documented Jewish birth ancestry, not religious practice.
Verification: Academy of Motion Picture Arts and Sciences, 46th Academy Awards (https://www.oscars.org/oscars/ceremonies/1974); Academy Edith Head collection (https://www.oscars.org/collection-highlights/edith-head); University of Wisconsin–Madison Edith & Oscar winner chronology (https://wcftr.commarts.wisc.edu/index.php/exhibits/edith-head-papers-1943-1965/edith-oscar-a-costume-exhibit/edith-oscar-an-overview/).