| Lane |
Swimmer |
Team |
Place |
Time |
| 1 |
Fanny Wu |
Rockville Montgomery Swim Club |
5 |
NS |
| 2 |
Kelsy Song |
Rockville Montgomery Swim Club |
1 |
18:39.71 |
| 3 |
Grace Sun |
Rockville Montgomery Swim Club |
2 |
19:30.17 |
| 4 |
Claudia Gibson |
Rockville Montgomery Swim Club |
4 |
20:04.23 |
| 5 |
Alexis Pincus |
Rockville Montgomery Swim Club |
3 |
19:39.62 |