2015 US Open – Girls' singles

Marie Bouzková was the defending champion, but she chose not to participate. Dalma Gálfi won the title, defeating Sofia Kenin in the final, 7–5, 6–4.

Seeds
• # 🇨🇿 Markéta Vondroušová (second round, retired)

• # 🇭🇺 Dalma Gálfi (champion)

• # 🇷🇺 Anna Blinkova (second round)

• # 🇸🇰 Tereza Mihalíková (third round)

• # 🇬🇧 Katie Swan (first round, retired)

• # 🇷🇺 Anna Kalinskaya (first round)

• # 🇨🇦 Charlotte Robillard-Millette (second round, retired)

• # 🇺🇸 Usue Maitane Arconada (third round)

• # 🇺🇸 Sofia Kenin (final)

• # 🇷🇺 Sofya Zhuk (quarterfinals)

• # 🇭🇺 Fanny Stollár (semifinals)

• # 🇧🇷 Luisa Stefani (first round)

• # 🇧🇾 Vera Lapko (quarterfinals)

• # 🇨🇳 Zheng Wushuang (second round)

• # 🇮🇳 Pranjala Yadlapalli (first round)

• # 🇩🇪 Katharina Hobgarski (first round)

Seeds
• # 🇷🇴 Georgia Crăciun (first round)

• # 🇨🇴 María Fernanda Herazo (first round)

• # 🇷🇴 Ioana Diana Pietroiu (qualifying competition)

• # 🇲🇩 Anastasia Dețiuc (qualified)

• # 🇧🇷 Thaisa Grana Pedretti (first round)

• # 🇷🇴 Oana Gavrilă (first round)

• # 🇦🇺 Maddison Inglis (qualified)

• # 🇨🇳 Yuan Yue (qualifying competition)

• # 🇮🇳 Mihika Yadav (first round)

• # 🇯🇵 Mayuka Aikawa (first round)

• # 🇳🇿 Jade Lewis (qualifying competition)

• # Eleni Christofi (qualifying competition)

• # 🇺🇦 Katarina Zavatska (qualified)

• # 🇨🇴 Yuliana Monroy (first round)

• # 🇺🇸 Maria Mateas (qualifying competition)

• # 🇨🇦 Vanessa Wong (qualifying competition)

Qualifiers
• # Valentini Grammatikopoulou

• # 🇺🇸 Amanda Anisimova

• # 🇺🇸 Carson Branstine

• # 🇲🇩 Anastasia Dețiuc

• # Ana Paula Neffa de los Ríos

• # 🇺🇸 Natasha Subhash

• # 🇦🇺 Maddison Inglis

• # 🇺🇦 Katarina Zavatska