2004 US Open – Girls' singles

Kirsten Flipkens was the defending champion, but did not compete in the juniors that year.

Michaëlla Krajicek won the tournament, defeating Jessica Kirkland in the final, 6–1, 6–1.

Seeds
• # 🇺🇦 Kateryna Bondarenko (quarterfinals)

• # 🇮🇱 Shahar Pe'er (semifinals)

• # Michaëlla Krajicek (champion)

• # 🇺🇸 Jessica Kirkland (final)

• # Timea Bacsinszky (third round)

• # Yung-Jan Chan (second round)

• # 🇧🇾 Victoria Azarenka (semifinals)

• # 🇧🇾 Olga Govortsova (quarterfinals)

• # 🇷🇴 Monica Niculescu (quarterfinals)

• # 🇳🇿 Marina Erakovic (quarterfinals)

• # 🇨🇿 Veronika Chvojková (first round)

• # 🇷🇺 Irina Kotkina (third round)

• # 🇭🇺 Ágnes Szávay (third round)

• # 🇷🇴 Mădălina Gojnea (third round)

• # 🇷🇺 Alisa Kleybanova (second round)

• # 🇨🇦 Aleksandra Wozniak (third round)