| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Maitland, Sydney L (10)
|
PVMACH |
38.58 |
40.27 |
1.69 |
| 2 |
Nagle, Audrey R (10)
|
PVMACH |
38.39 |
40.71 |
2.32 |
| 3 |
Lewin, Nya L (10)
|
PVMACH |
40.46 |
41.21 |
0.75 |
| 4 |
Bordovsky, Abigail L (10)
|
PVMACH |
41.06 |
41.32 |
0.26 |
| 5 |
Kasemsuwannakaeth, Natcha (10)
|
PVMACH |
42.44 |
42.72 |
0.28 |
| 6 |
Lim Yang, Nora D (10)
|
PVMACH |
43.16 |
43.88 |
0.72 |
| 7 |
Becraft, Isabelle M (10)
|
PVMACH |
41.85 |
44.65 |
2.80 |
| 8 |
Kudelko, Lia G (10)
|
PVTOLL |
45.84 |
44.99 |
-0.85 |
| 9 |
Wang, Julia M (10)
|
PVMACH |
48.34 |
47.40 |
-0.94 |
| 10 |
Brown, Isabel D (10)
|
PVTOLL |
45.15 |
48.14 |
2.99 |
| 11 |
Cantua, Sofia C (10)
|
PVMACH |
|
49.24 |
- |