2021 Australian Open – Women's doubles

Elise Mertens and Aryna Sabalenka defeated Barbora Krejčíková and Kateřina Siniaková in the final, 6–2, 6–3, to win the women's doubles tennis title at the 2021 Australian Open. It was their second major doubles title as a team, after the 2019 US Open. With the win, Sabalenka claimed the world No. 1 doubles ranking.

Tímea Babos and Kristina Mladenovic were the reigning champions, but withdrew from the tournament.

Seeds
• Hsieh Su-wei / 🇨🇿 Barbora Strýcová (second round)

• 🇧🇪 Elise Mertens / 🇧🇾 Aryna Sabalenka (champions)

• 🇨🇿 Barbora Krejčíková / 🇨🇿 Kateřina Siniaková (final)

• 🇺🇸 Nicole Melichar / Demi Schuurs (semifinals)

•  Chan Hao-ching /  Latisha Chan (first round)

• 🇨🇦 Gabriela Dabrowski / 🇺🇸 Bethanie Mattek-Sands (second round)

• 🇯🇵 Shuko Aoyama / 🇯🇵 Ena Shibahara (quarterfinals)

• 🇨🇳 Duan Yingying / 🇨🇳 Zheng Saisai (first round)

•  Alexa Guarachi / 🇺🇸 Desirae Krawczyk (third round)

• 🇦🇺 Samantha Stosur / 🇨🇳 Zhang Shuai (first round)

• 🇨🇳 Xu Yifan / 🇨🇳 Yang Zhaoxuan (second round)

• 🇺🇸 Hayley Carter / 🇧🇷 Luisa Stefani (third round)

• 🇺🇦 Lyudmyla Kichenok /  Jeļena Ostapenko (third round)

• 🇧🇪 Kirsten Flipkens /  Andreja Klepač (second round)

• 🇷🇺 Anna Blinkova / 🇷🇺 Veronika Kudermetova (first round)

• 🇩🇪 Laura Siegemund / 🇷🇺 Vera Zvonareva (third round)

Wild cards
• 🇦🇺 Destanee Aiava / 🇦🇺 Astra Sharma

• 🇦🇺 Kimberly Birrell / 🇦🇺 Jaimee Fourlis

• 🇦🇺 Lizette Cabrera / 🇦🇺 Maddison Inglis

• 🇦🇺 Olivia Gadecki / 🇦🇺 Belinda Woolcock

• 🇦🇺 Daria Gavrilova / 🇦🇺 Ellen Perez

• 🇷🇴 Simona Halep / 🇦🇺 Charlotte Kempenaers-Pocz

• 🇦🇺 Abbie Myers / 🇦🇺 Ivana Popovic

Protected ranking
• 🇩🇪 Mona Barthel / 🇨🇳 Zhu Lin

• 🇺🇦 Kateryna Bondarenko / 🇺🇦 Nadiia Kichenok

• 🇷🇸 Aleksandra Krunić / 🇮🇹 Martina Trevisan

• 🇧🇾 Vera Lapko / 🇨🇿 Markéta Vondroušová

• 🇰🇿 Elena Rybakina / 🇰🇿 Yaroslava Shvedova

Withdrawals
• 🇺🇸 Amanda Anisimova / 🇨🇿 Markéta Vondroušová

• 🇭🇺 Tímea Babos / 🇫🇷 Kristina Mladenovic

• 🇩🇪 Mona Barthel / 🇩🇪 Anna-Lena Friedsam

• 🇫🇷 Alizé Cornet / 🇬🇧 Heather Watson

• 🇨🇳 Han Xinyun / 🇨🇳 Zhu Lin

• 🇧🇾 Vera Lapko / 🇺🇦 Dayana Yastremska

• 🇵🇱 Magda Linette / 🇺🇸 Bernarda Pera

• 🇨🇿 Květa Peschke / Rosalie van der Hoek