2021 National Bank Open – Women's doubles

Barbora Krejčíková and Kateřina Siniaková were the defending champions from when the tournament was last held in 2019, but withdrew before the tournament began.

Gabriela Dabrowski and Luisa Stefani won the title, defeating Darija Jurak and Andreja Klepač in the final, 6–3, 6–4.

Seeds
The top four seeds received a bye into the second round. • # 🇧🇪 Elise Mertens / 🇧🇾 Aryna Sabalenka (quarterfinals)

• # 🇯🇵 Shuko Aoyama / 🇯🇵 Ena Shibahara (second round)

• # 🇺🇸 Nicole Melichar / Demi Schuurs (second round)

• # Alexa Guarachi / 🇺🇸 Desirae Krawczyk (quarterfinals)

• # 🇨🇦 Gabriela Dabrowski / 🇧🇷 Luisa Stefani (champions)

• # Darija Jurak /  Andreja Klepač (final)

• # 🇦🇺 Ellen Perez / 🇨🇿 Květa Peschke (quarterfinals)

• # 🇺🇸 Coco Gauff / 🇺🇸 Jessica Pegula (first round)