C
1969 Dyan Cannon - Bob & Carol & Ted & Alice
1978 Dyan Cannon - Heaven Can Wait
1968 Lynn Carlin - Faces
1958 Peggy Cass - Auntie Mame
1967 Carol Channing - Thoroughly Modern Millie
2011 Jessica Chastain - The Help
1983 Cher - Silkwood
1963 Diane Cilento - Tom Jones
1973 Candy Clark - American Graffiti
2003 Patricia Clarkson - Pieces of April
1982 Glenn Close - The World According to Garp
1983 Glenn Close - The Big Chill
1984 Glenn Close - The Natural
1999 Toni Collette - The Sixth Sense
1941 Patricia Collinge - The Little Foxes
2001 Jennifer Connelly - A Beautiful Mind
1942 Gladys Cooper - Now, Voyager
1943 Gladys Cooper - The Song of Bernadette
1964 Gladys Cooper - My Fair Lady
1948 Ellen Corby - I Remember Mama
1974 Valentina Cortese - La Nuit américaine
1984 Lindsay Crouse - Places in the Heart
2008 Penélope Cruz - Vicky Cristina Barcelona
2009 Penélope Cruz - Nine
1977 Quinn Cummings - The Goodbye Girl
1988 Joan Cusack - Working Girl
1997 Joan Cusack - In & Out
Read more about this topic: List Of Nominees For The Academy Award For Best Supporting Actress (by Actress)