| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Rapisarda, Claudia (13)
|
MREAST |
56.71 |
57.64 |
0.93 |
| 2 |
Frey, Dolores S (12)
|
MREAST |
56.43 |
1:00.01 |
3.58 |
| 3 |
Vitti, Georgia H (12)
|
MREAST |
1:00.69 |
1:00.98 |
0.29 |
| 4 |
Cabello, Mackenzie E (12)
|
MREAST |
1:01.40 |
1:01.91 |
0.51 |
| 5 |
Portillo, Fernanda P (13)
|
MREAST |
1:02.21 |
1:02.14 |
-0.07 |
| 6 |
An, Gabrielle E (14)
|
MREAST |
1:01.92 |
1:02.33 |
0.41 |
| 7 |
Harris, Isla K (12)
|
MREAST |
1:02.97 |
1:02.53 |
-0.44 |
| 8 |
Harris, Paige A (14)
|
MREAST |
1:06.01 |
1:02.76 |
-3.25 |
| 9 |
McDonald, Isabel C (12)
|
MREAST |
1:11.36 |
1:03.12 |
-8.24 |
| 10 |
Iacobazzi, Alba (12)
|
MREAST |
1:03.31 |
1:03.13 |
-0.18 |
| 11 |
Joshi, Kiran S (13)
|
MREAST |
1:23.51 |
1:03.21 |
-20.30 |
| 12 |
Kohli, Eshani (12)
|
MREAST |
1:03.66 |
1:03.25 |
-0.41 |
| 13 |
McBreen, Carolyn A (13)
|
MREAST |
1:04.95 |
1:03.97 |
-0.98 |
| 14 |
Wang, Melissa R (13)
|
MREAST |
1:05.02 |
1:05.19 |
0.17 |
| 15 |
Brenner, Alexandra R (12)
|
MREAST |
1:05.54 |
1:05.44 |
-0.10 |