2015 US Open – Boys' singles

Omar Jasika was the defending champion, but he chose not to participate. Taylor Harry Fritz won the title, defeating Tommy Paul in the final, 6–2, 6–7(4–7), 6–2.

Seeds
• # 🇺🇸 Taylor Harry Fritz (champion)

• # 🇺🇸 Michael Mmoh (quarterfinals)

• # 🇸🇪 Mikael Ymer (quarterfinals)

• # 🇰🇷 Hong Seong-chan (quarterfinals)

• # 🇺🇸 Tommy Paul (final)

• # 🇺🇸 Reilly Opelka (third round)

• # 🇧🇷 Orlando Luz (second round)

• # Marcelo Tomás Barrios Vera (first round)

• # 🇺🇸 William Blumberg (third round)

• # 🇫🇷 Corentin Denolly (third round)

• # 🇰🇷 Chung Yun-seong (semifinals)

• # Lý Hoàng Nam (first round)

• # Lloyd Harris (third round)

• # 🇯🇵 Akira Santillan (third round)

• # 🇳🇴 Casper Ruud (third round)

• # Stefanos Tsitsipas (third round)

Seeds
• # Alberto Lim (first round)

• # 🇨🇳 Wu Yibing (qualifying competition)

• # 🇨🇦 Denis Shapovalov (qualified)

• # 🇪🇪 Mattias Siimar (qualified)

• # Benjamin Hannestad (qualified)

• # 🇦🇺 Alex de Minaur (qualified)

• # Wu Tung-lin (qualified)

• # 🇧🇷 Igor Marcondes (first round)

• # 🇧🇬 Alexandar Lazarov (first round)

• # 🇯🇵 Renta Tokuda (qualifying competition)

• # 🇷🇺 Artem Dubrivnyy (qualifying competition)

• # 🇪🇬 Youssef Hossam (qualified)

• # 🇮🇹 Corrado Summaria (first round)

• # 🇺🇸 Emil Reinberg (qualifying competition)

• # 🇷🇺 Naoto Kazakov (first round)

• # 🇷🇺 Alexey Aleshchev (qualifying competition)

Qualifiers
• # 🇪🇬 Youssef Hossam

• # 🇺🇸 J. J. Wolf

• # 🇨🇦 Denis Shapovalov

• # 🇪🇪 Mattias Siimar

• # Benjamin Hannestad

• # 🇦🇺 Alex de Minaur

• # Wu Tung-lin

• # 🇩🇪 Nicola Kuhn