| Boys' Singles | |
|---|---|
| 2008 US Open | |
| Champion |
|
| Runner-up |
|
| Final score | 6–4, 6–3 |
Ričardas Berankis was the defending champion but, no longer competing in junior tennis, did not defend his title.
Grigor Dimitrov won in the final 6–4, 6–3, against Devin Britton.