In 96 years of Oscars, 80 women have won the Best Actress Oscar, some more than once.
1920s
1928: Janet Gaynor (for 3 films), Seventh Heaven, Street Angel, Sunrise
1929: Mary Pickford, Coquette
1930s
1930: Norma Shearer, The Divorcee
1931: Marie Dressler, Min and Bill
1932: Helen Hayes, The Sin of Madelon Claudet
1933: Katharine Hepburn, Morning Glory
1934: Claudette Colbert, It Happened One Night
1935: Bette Davis, Dangerous
1936: Luise Rainer, Great Ziegfeld
1937: Luise Rainer, The Good Earth
1938: Bette Davis, Jezebel
1939: Vivien Leigh, Gone with the Wind
1940s
1940: Ginger Rogers, Kitty Foyle
1941: Joan Fontaine, Suspicion
1942: Greer Garson, Mrs. Miniver
1943: Jennifer Jones, Song of Bernadette
1944: Ingrid Bergman, Gaslight
1945: Joan Crawford, Mildred Pierce
1946: Olivia De Havilland, To Each His Own
1947: Loretta Young, The Farmer’s Daughter
1948: Jane Wyman, Johnny Belinda
1949: Olivia De Havilland, The Heiress
1950s
1950: Judy Holliday, Born Yesterday
1951: Vivien Leigh, A Streetcar Named Desire
1952: Shirley Booth, Come Back Little Sheba
1953: Audrey Hepburn, Roman Holiday
1954: Grace Kelly, Country Girl
1955: Anna Magnani, The Rose Tattoo
1956: Ingrid Bergman, Anastasia
1957: Joanne Woodward, The Three Faces of Eve
1958: Susan Hayward, I want to Live
1959: Simone Signoret, Room at the Top
1960s
1960: Elizabeth Taylor, Butterfield 8
1961: Sophia Loren, Two Women
1962: Anne Bancroft, The Miracle Worker
1963: Patricia Neal, Hud
1964: Julie Andrews, Mary Poppins
1965: Julie Christie, Darling
1966: Elizabeth Taylor, Who’s Afraid of Virginia Woolf
1967: Katharine Hepburn, Guess Who’s Coming to Dinner
1968: Tie–Katharine Hepburn, The Lion in Winter; Barbra Streisand, Funny Girl
1969: Maggie Smith, The Prime of Miss Jean Brodie
1970s
1970: Glenda Jackson, Women in Love
1971: Jane Fonda, Klute
1972: Liza Minnelli, Cabaret
1973: Glenda Jackson, A Touch of Class
1974: Ellen Burstyn, Alice Doesn’t Live Here Anymore
1975: Louise Fletcher, One Flew Over the Cukoo’s Nest
1976: Faye Dunaway, Network
1977: Diane Keaton, Annie Hall
1978: Jane Fonda, Coming Home
1979: Sally Field, Norma Rae
1980s
1980: Sissy Spacek, A Coal Miner’s Daughter
1981: Katharine Hepburn, On Golden Pond
1982: Meryl Streep, Sophie’s Choice
1983: Shirley MacLaine, Terms of Endearment
1984: Sally Field, Places in Heart
1985: Geraldine Page, The Trip to Bountiful
1986: Marlee Matlin, Children of a Lesser God
1987: Cher, Moonstruck
1988: Jodie Foster, The Accused
1989: Jessica Tandy, Driving Miss Daisy
1990s
1990: Kathy Bates, Misery
1991: Jodie Foster, The Silence of the Lambs
1992: Emma Thompson: Howards End
1993: Holly Hunter, The Piano
1994: Jessica Lange, Blue Sky
1995: Susan Sarandon, Dead Man Walking
1996: Frances McDormand, Fargo
1997: Helen Hunt, As Good As It Gets
1998: Gwyneth Paltrow, Shakespeare in Love
1999: Hilary Swank, Boys Don’t Cry
2000s
2000: Julia Roberts, Erin Brockovich
2001: Halle Berry, Monster’s Ball
2002: Nicole Kidman, The Hours
2003: Charlize Theron, Monster
2004: Hilary Swank, Million Dollar Baby
2005: Reese Witherspoon, Walk the Line
2006: Helen Mirren, The Queen
2007: Marion Cotillard, La Vie en Rose
2008: Kate Winslet, The Reader
2009: Sandra Bullock, The Blind Side
2010-2019
2010: Natalie Portman, Black Swan
2011: Meryl Streep, The Iron Lady
2012: Jennifer Lawrence, Silver Linings Playbook
2013: Cate Blanchett, Blue Jasmin
2014: Brie Larson, Room
2015: Julianne Moore, Still Alice
2016: Emma Stone, La La Land
2017: Frances McDormand, Three Billboards Outside Ebbing, Missouri
2018: Olivia Colman, The Favourite
2019: Renee Zellweger, Judy
2020-Present
2020: Frances McDormand, Nomadland
2021: Jessica Chastain, The Eyes of Tammy Faye
2022: Michelle Yeoh, Everything Everywhere All At Once
2023: Emma Stone, Poor Things