2008 Australian Open – Boys' singles

Bernard Tomic won in the final 4–6, 7–6(7–5), 6–0, against Yang Tsung-hua and claimed the title, becoming the youngest player to win a grand slam title.

Brydan Klein was the defending champion, but did not compete in the juniors event that year.

Seeds
• # 🇲🇽 César Ramírez (quarterfinals)

• # 🇵🇱 Jerzy Janowicz (quarterfinals)

• # 🇬🇧 Daniel Evans (quarterfinals)

• # 🇺🇸 Ryan Harrison (semifinals)

• # 🇦🇺 Bernard Tomic (champion)

• # 🇦🇺 Andrew Thomas (third round)

• # 🇦🇺 Jared Easton (third round)

• # 🇮🇳 Yuki Bhambri (semifinals)

• # 🇦🇺 Matt Reid (first round)

• # Yang Tsung-hua (final)

• # 🇩🇪 Jaan-Frederik Brunken (third round)

• # 🇦🇺 Mark Verryth (second round)

• # 🇹🇭 Kittipong Wachiramanowong (third round)

• # 🇨🇦 Vasek Pospisil (first round)

• # 🇺🇸 Ty Trombetta (third round)

• # 🇬🇧 Marcus Willis (withdrew)