The Charleston Open, currently sponsored by Credit One, is a WTA Tour-affiliated professional tennis tournament for women, held every year since 1973. It is the oldest professional all-women's tournament in America with a $888,636 purse. The tournament celebrated 50 years in 2022 at the newly renovated Credit One Stadium located in Charleston, South Carolina.

The tournament is played on the green clay courts at LTP-Daniel Island (which contains the 10,200-seat Credit One Stadium) on Daniel Island in Charleston, South Carolina, US. From its inception in 1973 to 2000, the tournament was held at the Sea Pines Plantation on Hilton Head Island with the exception of 1975 and 1976 when it was played on Amelia Island off the coast of Florida. The event moved to Charleston, and specifically Daniel Island, in 2001.

From 1973 to 2015, the title sponsor was Family Circle magazine, which had made it the longest-running title sponsor in professional tennis. Volvo Cars took over sponsorship from 2016 to 2021. Credit One Bank became the title sponsor of both the tournament and stadium in July 2021. Also in 2021, two tournaments were organised in consecutive weeks as a makeup tournament for those cancelled by pandemic restrictions. The Medical University of South Carolina sponsored the event.

From 1990 to 2008, the tournament was classified as a WTA Tier I event. In 2009, it was downgraded to a WTA Premier tournament. It celebrated its 40th year in 2012 by naming its main stadium court in honor of Billie Jean King. With the reorganization of the WTA's schedule in 2021, the tournament became a WTA 500 tournament. The 2021 second tournament held the week afterwards was part of the WTA 250 tournaments list.

The current champion is Danielle Collins, who won the singles tournament in April 2024.

Year	Champion	Runner-up	Score
1973	Rosemary Casals	Nancy Richey	3–6, 6–1, 7–5
1974	Chris Evert	Kerry Melville	6–1, 6–3
1975	Chris Evert (2)	Martina Navratilova	7–5, 6–4
1976	Chris Evert (3)	Kerry Reid	6–2, 6–2
1977	Chris Evert (4)	Billie Jean King	6–0, 6–1
1978	Chris Evert (5)	Kerry Reid	6–2, 6–0
1979	Tracy Austin	Kerry Reid	7–6, 7–6
1980	Tracy Austin (2)	Regina Maršíková	3–6, 6–1, 6–0
1981	Chris Evert (6)	Pam Shriver	6–3, 6–2
1982	Martina Navratilova	Andrea Jaeger	6–4, 6–2
1983	Martina Navratilova (2)	Tracy Austin	5–7, 6–1, 6–0
1984	Chris Evert (7)	Claudia Kohde-Kilsch	6–2, 6–3
1985	Chris Evert (8)	Gabriela Sabatini	6–4, 6–0
1986	Steffi Graf	Chris Evert	6–4, 7–5
1987	Steffi Graf (2)	Manuela Maleeva-Fragnière	6–2, 4–6, 6–3
↓  Tier II event  ↓
1988	Martina Navratilova (3)	Gabriela Sabatini	6–1, 4–6, 6–4
1989	Steffi Graf (3)	Natasha Zvereva	6–1, 6–1
↓  Tier I event  ↓
1990	Martina Navratilova (4)	Jennifer Capriati	6–2, 6–4
1991	Gabriela Sabatini	Leila Meskhi	6–1, 6–1
1992	Gabriela Sabatini (2)	Conchita Martínez	6–1, 6–4
1993	Steffi Graf (4)	Arantxa Sánchez Vicario	7–6, 6–1
1994	Conchita Martínez	Natalia Zvereva	6–4, 6–0
1995	Conchita Martínez (2)	Magdalena Maleeva	6–1, 6–1
1996	Arantxa Sánchez Vicario	Barbara Paulus	6–2, 2–6, 6–2
1997	Martina Hingis	Monica Seles	3–6, 6–3, 7–6
1998	Amanda Coetzer	Irina Spîrlea	6–3, 6–4
1999	Martina Hingis (2)	Anna Kournikova	6–4, 6–3
2000	Mary Pierce	Arantxa Sánchez Vicario	6–1, 6–0
2001	Jennifer Capriati	Martina Hingis	6–0, 4–6, 6–4
2002	Iva Majoli	Patty Schnyder	7–6, 6–4
2003	Justine Henin	Serena Williams	6–3, 6–4
2004	Venus Williams	Conchita Martínez	2–6, 6–2, 6–1
2005	Justine Henin (2)	Elena Dementieva	7–5, 6–4
2006	Nadia Petrova	Patty Schnyder	6–3, 4–6, 6–1
2007	Jelena Janković	Dinara Safina	6–2, 6–2
2008	Serena Williams	Vera Zvonareva	6–4, 3–6, 6–3
↓  Premier event  ↓
2009	Sabine Lisicki	Caroline Wozniacki	6–2, 6–4
2010	Samantha Stosur	Vera Zvonareva	6–0, 6–3
2011	Caroline Wozniacki	Elena Vesnina	6–2, 6–3
2012	Serena Williams (2)	Lucie Šafářová	6–0, 6–1
2013	Serena Williams (3)	Jelena Janković	3–6, 6–0, 6–2
2014	Andrea Petkovic	Jana Čepelová	7–5, 6–2
2015	Angelique Kerber	Madison Keys	6–2, 4–6, 7–5
2016	Sloane Stephens	Elena Vesnina	7–6, 6–2
2017	Daria Kasatkina	Jeļena Ostapenko	6–3, 6–1
2018	Kiki Bertens	Julia Görges	6–2, 6–1
2019	Madison Keys	Caroline Wozniacki	7–6, 6–3
↓  WTA 500 event  ↓
2021 (a)	Veronika Kudermetova	Danka Kovinić	6–4, 6–2
↓  WTA 250 event  ↓
2021 (b)	Astra Sharma	Ons Jabeur	2–6, 7–5, 6–1
↓  WTA 500 event  ↓
2022	Belinda Bencic	Ons Jabeur	6–1, 5–7, 6–4
2023	Ons Jabeur	Belinda Bencic	7–6, 6–4
2024	Danielle Collins	Daria Kasatkina	6–2, 6–1

Year	Champions	Runners-up	Score
1973	Françoise Dürr Betty Stöve	Rosemary Casals Billie Jean King	3–6, 6–4, 6–3
1974	Rosemary Casals Olga Morozova	Helen Gourlay Karen Krantzcke	6–2, 6–1
1975	Evonne Goolagong Cawley Virginia Wade	Rosemary Casals Olga Morozova	4–6, 6–4, 6–2
1976	Ilana Kloss Linky Boshoff	Kathy Kuykendall Valerie Ziegenfuss	6–3, 6–2
1977	Rosemary Casals (2) Chris Evert	Françoise Dürr Virginia Wade	1–6, 6–2, 6–3
1978	Billie Jean King Martina Navratilova	Mona Guerrant Greer Stevens	6–3, 7–5
1979	Rosemary Casals (3) Martina Navratilova (2)	Françoise Dürr Betty Stöve	6–4, 7–5
1980	Kathy Jordan Anne Smith	Candy Reynolds Paula Smith	6–2, 6–1
1981	Rosemary Casals (4) Wendy Turnbull	Mima Jaušovec Pam Shriver	7–5, 7–5
1982	Martina Navratilova (3) Pam Shriver	JoAnne Russell Virginia Ruzici	6–1, 6–2
1983	Martina Navratilova (4) Candy Reynolds	Andrea Jaeger Paula Smith	6–2, 6–3
1984	Claudia Kohde-Kilsch Hana Mandlíková	Anne Hobbs Sharon Walsh	7–5, 6–2
1985	Rosalyn Fairbank Pam Shriver (2)	Svetlana Parkhomenko Larisa Savchenko	6–4, 6–1
1986	Chris Evert (2) Anne White	Steffi Graf Catherine Tanvier	6–3, 6–3
1987	Mercedes Paz Eva Pfaff	Zina Garrison Lori McNeil	7–6, 7–5
1988	Lori McNeil Martina Navratilova (5)	Claudia Kohde-Kilsch Gabriela Sabatini	6–2, 2–6, 6–3
1989	Hana Mandlíková Martina Navratilova (6)	Mary-Lou Daniels Wendy White	6–4, 6–1
↓  Tier I event  ↓
1990	Martina Navratilova (7) Arantxa Sánchez Vicario	Mercedes Paz Natasha Zvereva	6–2, 6–1
1991	Claudia Kohde-Kilsch (2) Natasha Zvereva	Mary-Lou Daniels Lise Gregory	6–4, 6–0
1992	Arantxa Sánchez Vicario (2) Natasha Zvereva (2)	Larisa Savchenko-Neiland Jana Novotná	6–4, 6–2
1993	Gigi Fernández Natasha Zvereva (3)	Katrina Adams Manon Bollegraf	6–3, 6–1
1994	Lori McNeil (2) Arantxa Sánchez Vicario (3)	Gigi Fernández Natasha Zvereva	6–4, 4–1 retired
1995	Nicole Arendt Manon Bollegraf	Gigi Fernández Natasha Zvereva	0–6, 6–3, 6–4
1996	Jana Novotná Arantxa Sánchez Vicario (4)	Gigi Fernández Mary Joe Fernández	6–2, 6–3
1997	Mary Joe Fernández Martina Hingis	Lindsay Davenport Jana Novotná	7–5, 4–6, 6–1
1998	Conchita Martínez Patricia Tarabini	Lisa Raymond Rennae Stubbs	3–6, 6–4, 6–4
1999	Elena Likhovtseva Jana Novotná (2)	Barbara Schett Patty Schnyder	6–1, 6–4
2000	Virginia Ruano Pascual Paola Suárez	Conchita Martínez Patricia Tarabini	7–5, 6–3
2001	Lisa Raymond Rennae Stubbs	Virginia Ruano Pascual Paola Suárez	5–7, 7–6, 6–3
2002	Lisa Raymond (2) Rennae Stubbs (2)	Alexandra Fusai Caroline Vis	6–4, 3–6, 7–6
2003	Virginia Ruano Pascual (2) Paola Suárez (2)	Janette Husárová Conchita Martínez	6–0, 6–3
2004	Virginia Ruano Pascual (3) Paola Suárez (3)	Martina Navratilova Lisa Raymond	6–4, 6–1
2005	Conchita Martínez (2) Virginia Ruano Pascual (4)	Iveta Benešová Květa Hrdličková Peschke	6–1, 6–4
2006	Lisa Raymond (3) Samantha Stosur	Virginia Ruano Pascual Meghann Shaughnessy	3–6, 6–1, 6–1
2007	Yan Zi Zheng Jie	Peng Shuai Sun Tiantian	7–5, 6–0
2008	Katarina Srebotnik Ai Sugiyama	Edina Gallovits Olga Govortsova	6–2, 6–2
↓  Premier event  ↓
2009	Bethanie Mattek-Sands Nadia Petrova	Līga Dekmeijere Patty Schnyder	6–7, 6–2, [11–9]
2010	Liezel Huber Nadia Petrova (2)	Vania King Michaëlla Krajicek	6–3, 6–4
2011	Sania Mirza Elena Vesnina	Bethanie Mattek-Sands Meghann Shaughnessy	6–4, 6–4
2012	Anastasia Pavlyuchenkova Lucie Šafářová	Anabel Medina Garrigues Yaroslava Shvedova	5–7, 6–4, [10–6]
2013	Kristina Mladenovic Lucie Šafářová (2)	Andrea Hlaváčková Liezel Huber	6–3, 7–6
2014	Anabel Medina Garrigues Yaroslava Shvedova	Chan Hao-ching Chan Yung-jan	7–6, 6–2
2015	Martina Hingis (2) Sania Mirza (2)	Casey Dellacqua Darija Jurak	6–0, 6–4
2016	Caroline Garcia Kristina Mladenovic (2)	Bethanie Mattek-Sands Lucie Šafářová	6–2, 7–5
2017	Bethanie Mattek-Sands (2) Lucie Šafářová (3)	Lucie Hradecká Kateřina Siniaková	6–1, 4–6, [10–7]
2018	Alla Kudryavtseva Katarina Srebotnik (2)	Andreja Klepač María José Martínez Sánchez	6–3, 6–3
2019	Anna-Lena Grönefeld Alicja Rosolska	Irina Khromacheva Veronika Kudermetova	7–6, 6–2
↓  WTA 500 event  ↓
2021 (a)	Nicole Melichar Demi Schuurs	Marie Bouzková Lucie Hradecká	6–2, 6–4
↓  WTA 250 event  ↓
2021 (b)	Hailey Baptiste Caty McNally	Ellen Perez Storm Sanders	6–7, 6–4, [10–6]
↓  WTA 500 event  ↓
2022	Andreja Klepač Magda Linette	Lucie Hradecká Sania Mirza	6–2, 4–6, [10–7]
2023	Danielle Collins Desirae Krawczyk	Giuliana Olmos Ena Shibahara	0–6, 6–4, [14–12]
2024	Ashlyn Krueger Sloane Stephens	Lyudmyla Kichenok Nadiia Kichenok	1–6, 6–3, [10–7]

Because of an ongoing pandemic, the tournament in 2020 was reformatted into a Laver Cup style team tournament. Each team captain's name in BOLD and listed first.

Year	Winner	Loser	Score
2020	Bethanie Mattek-Sands Sofia Kenin Jennifer Brady Eugenie Bouchard Caroline Dolehide Danielle Collins Emma Navarro Ajla Tomljanović	Madison Keys Victoria Azarenka Sloane Stephens Amanda Anisimova Alison Riske Shelby Rogers Leylah Annie Fernandez Monica Puig	26–22

• Official site
• WTA tournament profile

32°51′41″N 79°54′13″W / 32.86139°N 79.90361°W / 32.86139; -79.90361