2019 Citi Open – Women's singles

Svetlana Kuznetsova was the defending champion, however she was unable to defend her title due to visa issues.

Jessica Pegula won her first WTA title, defeating Camila Giorgi in the final, 6–2, 6–2.

Seeds
• # 🇺🇸 Sloane Stephens (first round)

• # 🇺🇸 Madison Keys (first round)

• # 🇺🇸 Sofia Kenin (second round)

• # Hsieh Su-wei (quarterfinals)

• # 🇺🇦 Lesia Tsurenko (second round)

• # 🇨🇿 Kateřina Siniaková (first round)

• # 🇷🇺 Anastasia Pavlyuchenkova (first round)

• # Monica Puig (second round)

Seeds
• # 🇺🇸 Cori Gauff (qualified)

• # 🇺🇸 Sachia Vickery (qualified)

• # 🇺🇸 Francesca Di Lorenzo (qualifying competition)

• # 🇷🇺 Anna Kalinskaya (qualified)

• # 🇦🇺 Destanee Aiava (qualifying competition)

• # 🇷🇺 Varvara Gracheva (qualified)

• # 🇭🇺 Fanny Stollár (qualifying competition)

• # 🇯🇵 Hiroko Kuwata (qualifying competition)

Qualifiers
• # 🇺🇸 Cori Gauff

• # 🇺🇸 Sachia Vickery

• # 🇷🇺 Varvara Gracheva

• # 🇷🇺 Anna Kalinskaya