2017 Australian Open – Women's singles

Serena Williams defeated her sister Venus Williams in the final, 6–4, 6–4 to win the women's singles tennis title at the 2017 Australian Open. It was her seventh Australian Open singles title and her 23rd and last major singles title overall, surpassing Steffi Graf as the Open Era leader in women's singles major titles. Serena did not lose a set during the tournament. This marked the first time the Williams sisters contested a major final since the 2009 Wimbledon Championships, the first time they contested the Australian Open final since 2003, and their ninth and final meeting in a major final overall. With the win, Serena also regained the world No. 1 singles ranking, and remains the oldest woman in the Open Era to win a singles major, aged 35 years and four months. Serena was roughly 8-weeks pregnant with her first daughter, Alexis Olympia Ohanian Jr., by the end of the tournament. It was Venus' first major final since the 2009 Wimbledon Championships.

Angelique Kerber was the defending champion, but lost in the fourth round to CoCo Vandeweghe.

Mirjana Lučić-Baroni reached her second major semifinal over 17 years after her first, at the 1999 Wimbledon Championships.

Seeds
🇩🇪 Angelique Kerber (fourth round) 🇺🇸 Serena Williams (champion) 🇵🇱 Agnieszka Radwańska (second round) 🇷🇴 Simona Halep (first round) 🇨🇿 Karolína Plíšková (quarterfinals) 🇸🇰 Dominika Cibulková (third round) 🇪🇸 Garbiñe Muguruza (quarterfinals) 🇷🇺 Svetlana Kuznetsova (fourth round) 🇬🇧 Johanna Konta (quarterfinals) 🇪🇸 Carla Suárez Navarro (second round) 🇺🇦 Elina Svitolina (third round) Timea Bacsinszky (third round) 🇺🇸 Venus Williams (final) 🇷🇺 Elena Vesnina (third round) 🇮🇹 Roberta Vinci (first round) 🇨🇿 Barbora Strýcová (fourth round)

Caroline Wozniacki (third round) 🇦🇺 Samantha Stosur (first round) Kiki Bertens (first round) 🇨🇳 Zhang Shuai (second round) 🇫🇷 Caroline Garcia (third round) 🇦🇺 Daria Gavrilova (fourth round) 🇷🇺 Daria Kasatkina (first round) 🇷🇺 Anastasia Pavlyuchenkova (quarterfinals) 🇭🇺 Tímea Babos (first round) 🇩🇪 Laura Siegemund (first round) 🇷🇴 Irina-Camelia Begu (second round) 🇫🇷 Alizé Cornet (second round) Monica Puig (second round) 🇷🇺 Ekaterina Makarova (fourth round) 🇰🇿 Yulia Putintseva (second round) Anastasija Sevastova (third round)

Seeded players
The following are the seeded players and notable players who withdrew from the event. Seeding are arranged according to rankings on 9 January 2017, while ranking and points before are as of 16 January 2017.

The following players would have been seeded, but they withdrew or not entered from the event.

Wildcards
• 🇦🇺 Destanee Aiava

• 🇦🇺 Ashleigh Barty

• 🇦🇺 Lizette Cabrera

• 🇺🇸 Kayla Day

• 🇦🇺 Jaimee Fourlis

• 🇫🇷 Myrtille Georges

• 🇹🇭 Luksika Kumkhum

• 🇦🇺 Arina Rodionova

Protected ranking
• 🇮🇹 Karin Knapp (45)

• 🇺🇸 Anna Tatishvili (107)

• 🇰🇿 Galina Voskoboeva (64)

Qualifiers
• 🇩🇪 Mona Barthel

• 🇷🇺 Anna Blinkova

• 🇷🇴 Ana Bogdan

• 🇺🇸 Julia Boserup

• 🇺🇸 Jennifer Brady

• 🇯🇵 Eri Hozumi

• 🇷🇺 Elizaveta Kulichkova

• 🇧🇾 Aliaksandra Sasnovich

• 🇸🇰 Rebecca Šramková

• 🇷🇺 Natalia Vikhlyantseva

• Stefanie Vögele

• 🇨🇳 Zhu Lin

Lucky losers
• 🇧🇪 Maryna Zanevska

Withdrawals
• & 🇧🇾 Victoria Azarenka (13) → replaced by 🇷🇴 Patricia Maria Țig (107)

• † 🇩🇪 Anna-Lena Friedsam (67) → replaced by 🇺🇸 Anna Tatishvili (107 PR)

• † 🇨🇿 Petra Kvitová (11) → replaced by Hsieh Su-wei (108)

• † 🇺🇸 Madison Keys (8) → replaced by 🇷🇺 Ekaterina Alexandrova (109)

• † 🇷🇸 Ana Ivanovic (retirement from tennis) (63) → replaced by 🇨🇴 Mariana Duque Mariño (110)

• † 🇩🇪 Sabine Lisicki (92) → replaced by 🇨🇳 Han Xinyun (111)

• † 🇺🇸 Catherine Bellis (75) → replaced by 🇪🇪 Anett Kontaveit (112)

• † 🇺🇸 Sloane Stephens (35) → replaced by 🇺🇸 Samantha Crawford (113)

• † 🇸🇪 Johanna Larsson (50) → replaced by 🇧🇪 Maryna Zanevska (LL)

& – not included on entry list † – withdrew from entry list

Retirements
• 🇮🇹 Sara Errani

• 🇯🇵 Nao Hibino

• 🇮🇹 Karin Knapp