The 2021 Charleston Open (branded as the 2021 Volvo Car Open for sponsorship reasons) tournament was a women's professional tennis tournament played on outdoor clay courts at the Family Circle Tennis Center on Daniel Island in Charleston, South Carolina.

The first tournament of the 2021 doubleheader was the last to be sponsored by Chinese automaker Geely, the owner of Volvo Cars.

Due to the COVID-19 pandemic and local health guidelines impacting the facility's construction timeline, tournament organizers held the event behind closed doors for the second consecutive year after the preceding year's exhibition tournament was held under similar conditions.

[2][3] Veronika Kudermetova won her maiden career WTA title in the singles tournament.

[4] Nicole Melichar and Demi Schuurs won their third title as a team in the doubles tournament.