| Women’s Singles Champions | Women’s Doubles Champions |
| 1900 Miss Halstead, Astoria def. Mrs. W.M. Cook 6-2 6-1 | 1900 Miss Halstead-Miss Elmore, Astoria def. Miss Morse-Miss Lillie Carstens 2-6 6-4 7-5 |
| 1901 Lillie Carstens def. Mrs. E.A. Baldwin 7-5 6-3 | 1901 Mrs. E.A. Baldwin – Miss Booth def. Miss Morse – Miss Lillie Carstens 2-6 6-4 7-5 |
| 1902 Miss Atkinson, Philadelphia def. Mrs. E.A. Baldwin 7-5 6-1 | 1902 Miss Atkinson – Mrs. E.A Baldwin def. Miss Elizabeth Strong – Miss Goss 6-0 6-1 |
| 1903 Miss Amy Heitshu def. Miss Stella Fording 6-2 6-1 | 1903 Elizabeth Strong – Nan Robertson def. Amy Heitshu – Rachel Josephi 6-3 6-1 |
| 1904 Miss E.A. Baldwin def. Amy Heitshu 6-1 6-1 | 1904 Lillie Carstens – Mrs. Langton, Portland def. Elizabeth Strong – Ann Robertson 6-3 7-5 |
| 1905 Amy Heitshu def. Mrs. E.A. Baldwin 6-4 2-6 6-1 | 1905 Mrs. E.A. Baldwin – Nan Robertson def. Amy Heitshu – Rachel Josephi 3-6 6-2 9-7 |
| 1906 Amy Heitshu def. Nan Robertson 8-6 6-0 | 1906 Amy Heitshu – Rachel Josephi def. L. Weidler – D. Morrison 6-3 6-1 |
| 1907 Amy Heitshu def. Mrs. W.M. Cook 3-6 6-2 6-1 | 1907 Amy Heitshu – Rachel Josephi def. Mrs. W.M. Cook – Mrs. Dubois default |
| 1908 Hazel Hotchkiss, Berkeley def. Amy Heitshu 6-0 6-0 | 1908 Hazel Hotchkiss – Lessie Leadbetter def. Mrs. W.M. Cook – Stella Frohman 6-2 6-4 |
| 1909 Hazel Hotchkiss def. Elizabeth Ryan, Los Angeles 6-1 6-4 | 1909 Hazel Hotchkiss – Lessie Leadbetter def. Elizabeth Ryan – Stella Fording 6-4 6-4 |
| 1910 Hazel Hotchkiss def. Marian Pitts, Victoria 6-1 6-2 | 1910 Hazel Hotchkiss – Lessie Leadbetter def. Lillie Fox – W.I. Northrup 6-4 6-2 |
| 1911 Stella Fording def. Irene Campbell 9-11 7-5 6-4 | 1911 Lillie Fox – Stella Fording def. Lessie Leadbetter – Mrs Schaefer 3-6 6-2 7-5 |
| 1912 Irene Campbell def. Stella Fording 6-0 6-2 | 1912 Lillie Fox – Mrs. W.I. Northrup def. Stella Fording – Emily Valleau 6-3 6-3 |
| 1913 Sarah Livingston, Seattle def. Mrs. W.I. Northrup 6-4 6-4 | 1913 Sarah Livingston – Stella Fording def. Mrs. W.I Northrup – Lillie Fox 6-3 8-6 |
| 1914 Sarah Livingston def. Stella Fording 6-0 6-2 | 1914 Stella Fording – Clara Tucker def. Mrs. W.I. Northrup – Lillie Fox 6-0 6-2 |
| 1915 Sarah Livingston def. Mayme McDonald, Seattle 6-4 6-2 | 1915 Mayme McDonald – Mrs. F.E. Harrison def. Mrs. W.I. Northrup – Stella Fording 6-2 6-3 |
| 1916 Mrs. W.I. Northrup def. Stella Fording 8-6 6-3 | 1916 Mrs. W.I. Northrup – Stella Fording def. Marie Kettenbach – Miss Fix, Lewiston Id. 6-2 2-6 12-10 |
| 1917 No tournament | 1917 No tournament |
| 1918 Mayme McDonald def. Stella Fording 6-2 6-3 | 1918 Mayme McDonald – Mrs. J.C. Cushing def. Mrs. J.P. Mulder Mrs. Wentworth 6-2 6-3 |
| 1919 Mayme McDonald def. Mrs. J.C. Cushing, Berkeley 6-3 4-6 6-2 | 1919 Mayme McDonald – Mrs. J.C. Cushing def. Mrs. W.I. Northrup – Stella Fording 6-1 7-5 |
| 1920 Mayme McDonald def. Mrs. W.I. Northrup 6-2 9-7 | 1920 Mayme McDonald – Mrs. J.C. Cushing def. Irene Campbell – Gertrude Schriner, Seattle 6-0 7-5 |
| 1921 Mayme McDonald def. Stella Fording 6-1 6-1 | 1921 Mayme McDonald – Mrs. R.E. Bragdon, Seat. def. Mrs. W.I. Northrup – Stella Fording 6-4 6-4 |
| 1922 Mayme McDonald def. Mrs. J.C. Cushing 6-2 6-4 | 1922 Irene Campbell – Mrs. J.C. Cushing def. Mrs. W.I. Northrup – Stella Fording 6-1 5-7 6-1 |
| 1923 Marjorie Leeming, Calif. def. Mrs. J.C. Cushing 6-4 6-3 | 1923 Mrs. J.C. Cushing – Mrs. William Henry, L.A. def. Mrs. W.I. Northrup – Stella Fording 6-2 6-4 |
| 1924 Mrs. William Henry def. Miss Hickes 7-5 6-0 | 1924 Mrs. William Henry – Miss Hickes def. Miss Robinson – Miss Alberta Edtl 7-5 6-2 |
| 1925 Carolyn Schwartz, S.F. def. Mrs. Golda Gross, Berkeley 3-6 6-2 6-1 | 1925 Mrs. Ream Leachman – Carolyn Schwartz def. Mrs. Golda Gross – Miss Tokutu Moriwake 6-3 2-6 6-3 |
| 1926 Mrs Rena Leachman, Vallejo def. Carolyn Schwartz 7-5 4-6 6-4 | 1926 Mrs. Reem Leachman – Marian Leachman def. Stella Fording – Alberta Edtl 6-1 6-4 |
| 1927 Louise McFarland, S.F. def. Marian Williams. S.F. 4-6 6-2 6-3 | 1927 Louise McFarlane – Marian Williams def. Mrs. L.K. Verley – Marion Green 6-2 6-1 |
| 1928 Mrs Golda Gross def. Marion Green 6-1 6-2 | 1928 Josephine Cruikshank – Mrs. Golda Gross def. Marie McNab – Helen Sovenski 6-1 6-2 |
| 1929 Dorothy Weisel, Sacramento def. Marjorie Leeming 6-1 6-4 | 1929 Marion McFarlane – Marjorie McFarland, S.F. def. Mrs. Golda Gross – Dorothy Weisel |
| 1930 Charlotte Miller, S.F. def. Mrs Golda Gross 6-4 6-4 | 1930 Charlotte Miller – Mrs. Golda Gross def. Helen Sovenski – Marion Green 6-2 6-1 |
| 1931 Edith Cross S.F. def. Helen Marlowe, L.A. 6-3 6-3 | 1931 Edith Cross – Dorothea Perow, S.F. def. Helen & Mercedes Marlowe 6-2 6-1 |
| 1932 Gracyn Wheeler, L.A. def. Dorothea Schwartz S.F. 10-8 6-2 | 1932 Gracyn Wheeler – Theodosia Smith def. Dorothea Schwartz – Miss McBride 6-0 4-6 6-3 |
| 1933 Gracyn Wheeler def. Dorothy Bundy, Santa Monica 6-4 1-6 7-5 | 1933 Dorothy Bundy – May Doeg def. Gracyn Wheeler – Ann Cook, Seattle 6-2 6-4 |
| 1934 Muriel Nicholas def. Mrs Golda Gross 6-4 6-4 | 1934 Muriel Nicholas – Roth Ronald def. Mrs. Golda Gross – Kate Northcote, Berkeley 6-2 6-2 |
| 1935 Katherine Ross, L.A. def. Mrs Golda Gross 6-3 6-2 | 1935 Mrs. Golda Gross – Eleanor Dawson, Berkeley def. Katherine Rose – Jane Stanton 6-1 6-3 |
| 1936 Ruth Ronald def. Isabel Berry, Rome Ga. 6-1 6-3 | 1936 Leila Starr – Marge Stepp def. Esther Clark – Ann Frederickson 1-6 6-4 8-6 |
| 1937 Pat Canning, Alameda def. Cecile Miner, Long Beach 7-5 6-3 | 1937 Mrs. Golda Gross – Cecile Miner def. Hazel Schenck – Ruth Ronald 6-0 6-0 |
| 1938 Barbara Duncan, Alameda def. Helen Gurley, Sacramento 6-1 6-2 | 1938 Barbara Duncan – Helen Gurley def. Hazel Schenck – Ruth Ronald 6-4 6-2 |
| 1939 May Doeg, Santa Monica def. Lou Gates, S.F. 6-2 6-1 | 1939 May Doeg – Cecile Miner def. Helen Gurley – Shirley Parker 6-3 6-0 |
| 1940 Dorothy Head, Alameda def. Helen Gurley 6-4 4-6 6-2 | 1940 Dorothy Head – Helen Gurley def. Mrs. Golda Gross – Betty Willman 6-0 6-0 |
| 1941 Daphne Buckell def. Helen Gurley 6-0 6-2 | 1941 Dorothy Head – Helen Gurley def. Mrs. Golda Gross – Daphne Buckell 6-4 6-1 |
| 1942 Daphne Buckell def. Helen Gurley 6-2 6-4 | 1942 Helen Gurley – Barbara, Krase S.F. def. Dorothy Head – Daphne Buckell |
| 1943 Daphne Buckell def. Gladys Ross, Seattle 6-0 6-1 | 1943 Betty Parker – Lorraine Rhoades def. Daphne Buckell – Marge Neil 6-4 4-6 6-4 |
| 1944 Lorraine Rhodes def Gladys Ross 6-3 6-1 | 1944 Rose Schleifer – Lavelle Ransom def. Betty Parker – Lorraine Rhodes 6-3 6-0 |
| 1945 Gertrude Easton, Portland def. Arvilla McGuire, Berkeley 6-3 6-2 | 1945 Lorraine Rhodes – Gertrude Easton def. Rose Schleifer – Lorraine Holliday 6-4 6-3 |
| 1946 Betty Ravenscroft def. Arvilla McGuire 6-0 6-2 | 1946 Lorraine Rhodes – Betty Ravenscroft def. Arvilla McGuire – Marjorie McCord, Berkeley 6-3 6-2 |
| 1947 June Crow def. Gladys Ross 6-1 6-3 | 1947 |
| 1948 Rhodo Joan Hopkins def. Arvilla McGuire 6-4 6-4 | 1948 Rhoda Hopkins – Arvilla McGuire def. Barbara Lum – Mrs. Rose Mebesius 6-3 6-3 |
| 1949 Jean Doyle def. Carol Deim 6-1 6-0 | 1949 Jean Doyle – Carol Deim def. Jean Kropf – Mary Green 6-0 6-3 |
| 1950 Arvilla McGuire def. Patsy Heard 6-0 6-4 | 1950 |
| 1951 Connie Bowen def. Patsy Heard 6-1 7-5 | 1951 Patsy Heard – Barbara Lum def. Connie Bowen – Mary Taylor 6-4 4-6 7-5 |
| 1952 Peggy Manset, Los Angeles def. Mrs. June Lee 3-6 6-4 6-2 | 1952 Barbara Lum – Mrs Elizabeth Loeck, S.F. def. Mrs June Lee – Mrs Florabel Clough 6-4 6-1 |
| 1953 Mrs. Barbara Chandler, Boise def. Janet Hopps, Berkeley 6-2 6-4 | 1953 Janet Hopps – Barbara Lum def. Mrs Barbara Chandler – Mrs Julie Carter 6-3 6-3 |
| 1954 Janet Hopps def. Mary Ann Eilenberger 6-4 0-6 6-2 | 1954 Janet Hopps – Barbara Lumm def. Mrs Ann Eilenberger – Patsy Heard 6-4 6-2 |
| 1955 Joan Johnson, Los Angeles def. Geralyn Shepard, Los Angeles 6-2 6-1 | 1955 Joan Johnson – Gerald Shepard def. June FitzPatrick – Bonney Kinney 6-2 6-1 |
| 1956 Jean Laird, Berkeley def. Linda Vail, San Francisco 4-6 7-5 6-3 | 1956 Mrs June Lee – Patty Miller def. Sandra Veenboer – Donna Story, S.F. 6-1 6-4 |
| 1957 Janet Hopps def. Susan Butt, Victoria 6-1 6-0 | 1957 Janet Hopps – Susan Butt def. Mrs June Lee – Patty Miller 6-3 6-2 |
| 1958 Barbara Browning, Los Angeles def. Farel Footman, San Francisco 6-3 3-6 6-1 | 1958 Barbara Browning – Pamela Davis def. Linda Yeomans – Susan Proctor 1-6 6-3 6-2 |
| 1959 Mrs. Lucille Davidson, Kansas City def. June Hurtt 6-4 6-1 | 1959 Mrs Lucille Davidson – Doris Popple def. Sonia Berdam – Mrs. Valeria Williamson 6-3 6-1 |
| 1960 Andria Miller def. Constance Jaster 7-5 6-1 | 1960 Constance Jaster – Suzanne Mandel def. Mrs. Mirja Rose – Mrs. June Lee 6-1 8-10 6-1 |
| 1961 Margot Hedges def. Mrs. Mirja Rose 6-1 6-4 | 1961 Roberta Roundtree – Jan Wedertz def. bette Best – Pat Knox 6-2 6-1 |
| 1962 Faye Urban def. Vicki Berner, Vancouver, B.C. 6-3 3-6 6-2 | 1962 Mary Weiss – Chris Matson def. Linda Yee – Joyce Yee, Seattle 6-4 6-3 |
| 1963 Diana Gai def. Mrs. Barbara Chandler 2-6 6-4 6-4 | 1963 Linda Yee – Joyce Yee def. Diana Gai – Mary Sherar 6-2 7-5 |
| 1964 Mari Ann Poiset def. Sharon Russell 6-3 8-6 | 1964 Sharon Russell – Veronica Olive def. Linda Yee – Elizabeth Blackford, Seattle 6-3 6-2 |
| 1965 Julie Kaspari def. Andrea Martin 2-6 6-4 6-2 | 1965 no information available |
| 1966 Pat Conger def. Mrs. Pat Welles, Berkeley 6-2 6-1 | 1966 Sue Graham – Mari Lou Conley def. Mrs. Hedy Jackson – Doris Popple 7-5 6-8 6-1 |
| 1967 Mrs Pat Welles def. Mrs. Hedy Jackson 6-3 6-2 | 1967 Miss Judith – Doris Hakman def. Mrs Pat Welles – Mrs. Marilyn Muench 6-4 7-5 |
| 1968 Mrs Hedy Jackson def. Doris Popple 3-6 6-0 6-2 | 1968 Mrs. Hedy Jackson – Doris Popple def. Mrs. Sally Frye – Joan Egbers 6-1 6-0 |
| 1969 Mrs. Hedy Jackson def. Pat Bostrom, Seattle 6-2 6-3 | 1969 Mrs. Hedy Jackson – Doris Popple def. Dianne Powell – Mary McLean 2-6 6-1 6-4 |
| 1970 Mary McLean def. Mrs. Hedy Jackson 3-6 7-5 6-4 | 1970 Doreen Irish – Mary Hasse def. Mrs. Hedy Jackson – Doris Popple 6-1 7-5 |
| 1971 Kate Latham def. Mrs. Hedy Jackson 7-6 3-6 6-2 | 1971 Michelle Carey – Carolyn Lumber def. Hedy Jackson – Joanne Kraft 6-1 6-2 |
| 1972 Mrs. Hedy Jackson def. Cynthia Marquette 6-2 6-0 | 1972 Mary Delay – Dodo Cheney def. Carolyn Lumber – Cynthia Marquette 6-2 6-0 |
| 1973 Barbara Weigandt def. Claire Schmoyer 6-1 7-5 | 1973 Barbara Weigandt – Dodo Cheney def. Claire & Kay Schmoyer 6-3 7-5 |
| 1974 Claire Schmoyer def. Michelle Carey 6-1 7-5 | 1974 C. Pearson – S. Moore def ? |
| 1975 Claire Schmoyer def Isabelle Ortiz 7-6 3-6 6-3 | 1975 C Schmoyer – L. Ortiz def. B. Barger – M. Colville 6-4 6-3 |
| 1976 Lindsay Berman def. Carolyn Culham 7-6 6-2 | 1976 Carolyn Culham – Michelle Carey def. Joanne Kraft – Nancy Russell 7-6 6-2 |
| 1977 Sonoe Yonezawa def Robin Lucey 3-6 6-2 6-1 | 1977 Carolyn Culham – Michelle Carey def Helen Metzger – Pearson 6-1 3-6 7-6 |
| 1978 Robin Lacey def. Michelle Carey 6-1 6-2 | 1978 Carolyn Culham – Michelle Carey def. Joanne Kraft – J. Hasse 6-4 7-6 |
| 1979 | 1979 |
| 1980 Cynthia Norman def. ? | 1980 |
| 1981 Nami Kouzu def. Judy Newman 6-2 3-6 6-3 | 1981 N. Kouzu – J. Newman def. Debbie LeBer – Carolyn Lumber |
| 1982 Masako Yanagi def. Fumiko Furuhashi 6-4 6-0 | 1982 |
| 1983 Carol Coparanis def ? | 1983 C. Dorsey – J. Grummer def. ? |
| 1984 Carol Bertrand def. Mary Torres 6-1 6-0 | 1984 |
| 1985 Nancy Osborne def. Mary Deits 6-3 7-6 | 1985 |
| 1986 Lisa Blackshear def. Carol Bertrand | 1986 Carolyn Lumber – Carol Bertrand def. Lisa Blackshem – Lori Jones 7-5 2-6 7-5 |
| 1987 | 1987 |
| 1988 Janet Kovacevich | 1988 |
| 1989 | 1989 |
| 1990 | 1990 |
| 1991 | 1991 |
| 1992 | 1992 |
| 1993 S. Schenck | 1993 |
| 1994 S. Schenck | 1994 |
| 1995 I. McCalla | 1995 |
| 1996 J. Watanabe | 1996 |
| 1997 J. Watanabe | 1997 |
| 1998 E. Perkins | 1998 |
| 1999 R. Kolbovic | 1999 |
| 2000 C. Perkins | 2000 |
| 2001 T. Botts | 2001 |
| 2002 H. Sromova | 2002 |
| 2003 M. Nezedly | 2003 |
| 2004 Kristina Kraszewski def. Courtney Perkins 6-3, 6-2 | 2004 Gonzales/Perkins def. Bessman/Juppenlatz 6-3, 6-2 |
| 2005 Ashley Joelson def. Emily Kirchem 6-0, 6-0 | 2005 Hunt/Kirchem def. Juppenlatz/Leong 6-1, 6-0 |
| 2006 Ashley Joelson def. Emily Kirchem 6-3, 6-1 | 2006 Joelson/Matzenauer def. Kirchem/Neal 6-3, 6-2 |
| 2007 Dea Sumantri def. Suzanne Matzenauer 7-6, 6-2 | 2007 Leite/Poveda def. Indic/juppenlatz 6-4, 6-0 |
| 2008 Kelcy McKenna def. Suzanne Matzenauer 7-5, 6-2 | 2008 Matzenauer/McKenna def. Indic/Williams 6-1, 6-0 |
| 2009 Kelcy McKenna def. Suzanne Matzenauer 6-3, 6-3 | 2009 Dieskova/Joelson def. Indic/Juppenlatz 6-3, 6-0 |
| 2010 Venise Chan def. Kelsy McKenna 6-3, 0-6, 6-3 | 2010 Matzenauer/McKenna def. Dodge/Indic 6-2, 6-1 |
| 2011 Suzanne Matzenauer def. Romana Tedjakusuma 6-2, 1-6, 6-4 | 2011 Edwards/Seiverling def. Lemes/Matzenauer 0-6, 7-6, 7-6 |
| 2012 Suzanne Matzenauer def. Giuliana Olmos 2-6, 6-4, 7-5 | 2012 Matzenauer/McKenna def. Sporndi/Wagner 6-2, 6-4 |
| 2013 Suzanne Matzenauer def. Meghan Cassens 6-0, 6-1 | 2013 Edwards/Ivanova def. Cassens/Metzger 6-3, 6-0 |
| 2014 Samantha Hampton def. Katie Edwards 7-5, 6-2 | 2014 Fox/Mulholland def. Ansboury/Yaneva 6-2, 6-2 |
| 2015 Gail Brodsky def. Bess Waldram 6-1, 7-5 | 2015 Bordeleau/Edwards def. Matzenauer/Meza 6-3, 1-6, 6-3 |
| 2016 Michelle Lui def. Bess Waldram 4-6, 6-4, 6-4 | 2016 Demarath/Lui def. Meza/Van Den Aarsen 7-5, 6-0 |
| 2017 Alyssa Tobita def Zoe Scandalis 6-1, 3-6, 6-2 | 2017 Scandalis/Tobita – winner of round robin |
| 2018 Lexi Keberle def Chloe Goyette 6-2, 6-4 | 2018 Lazarevic/Van Den Aarssen def yu/Yu 6-0, 6-2 |
| 2019 Serim Jin def. Kayjeigh Tanka 6-3, 6-0 | 2019 Sebulski/Watanabe def. Kern/Kern 6-4, 6-3 |
| 2020 Not held- Corona Virus | 2020 Not held – Corona Virus |