| Girls' Singles | |
|---|---|
| 2003 US Open | |
| Champion |
|
| Runner-up |
|
| Final score | 6–3, 7–5 |
Maria Kirilenko was the defending champion, but did not compete in the juniors that year.
Kirsten Flipkens won the tournament, defeating Michaëlla Krajicek in the final, 6–3, 7–5.