2017 Australian Open – Girls' singles

Marta Kostyuk won the title, defeating Rebeka Masarova in the final, 7–5, 1–6, 6–4.

Vera Lapko was the defending champion, but was no longer eligible to participate in junior events. She received a wildcard into the women's singles qualifying competition, where she lost in the second round to Ons Jabeur.

Seeds
• # Rebeka Masarova (final)

• # 🇺🇸 Taylor Johnson (third round)

• # 🇨🇳 Wang Xiyu (second round)

• # 🇬🇧 Emily Appleton (quarterfinals)

• # 🇷🇸 Olga Danilović (third round, retired)

• # 🇬🇧 Jodie Anna Burrage (third round)

• # 🇨🇦 Bianca Andreescu (semifinals)

• # 🇵🇱 Iga Świątek (first round)

• # 🇯🇵 Ayumi Miyamoto (first round)

• # 🇯🇵 Mai Hontama (quarterfinals)

• # 🇺🇦 Marta Kostyuk (champion)

• # 🇺🇸 Caty McNally (first round)

• # 🇺🇸 Carson Branstine (third round)

• # 🇯🇵 Yuki Naito (third round)

• # 🇺🇸 Natasha Subhash (first round)

• # 🇷🇺 Elena Rybakina (semifinals)

Seeds
• # 🇬🇧 Ali Collins (qualified)

• # 🇩🇪 Jule Niemeier (qualified)

• # 🇰🇷 Lee Eun-hye (qualified)

• # 🇱🇺 Eléonora Molinaro (qualified)

• # 🇺🇸 Alana Smith (first round)

• # 🇯🇵 Himari Sato (qualified)

• # 🇷🇺 Ekaterina Vishnevskaya (qualified)

• # Ana Biškić (qualifying competition)

• # Lexie Stevens (first round)

• # 🇺🇸 Jimena Rodriguez-Benito (qualified)

• # 🇵🇱 Weronika Falkowska (qualifying competition)

• # Joanna Garland (qualifying competition)

• # 🇮🇳 Nidhi Surapaneni (qualifying competition)

• # Cho Yi-tsen (first round)

• # 🇨🇳 Yang Yidi (qualifying competition)

• # 🇯🇵 Rika Tanaka (qualifying competition)

Qualifiers
• # 🇬🇧 Ali Collins

• # 🇩🇪 Jule Niemeier

• # 🇰🇷 Lee Eun-hye

• # 🇱🇺 Eléonora Molinaro

• # 🇵🇬 Patricia Apisah

• # 🇯🇵 Himari Sato

• # 🇷🇺 Ekaterina Vishnevskaya

• # 🇺🇸 Jimena Rodriguez-Benito