| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Fong-Causone, Sofia A (12)
|
MRYFD |
1:12.49 |
1:11.36 |
-1.13 |
| 2 |
Draven, Julia Z (11)
|
MRYFD |
1:14.77 |
1:14.51 |
-0.26 |
| 3 |
Brower, Riley S (11)
|
MRTRI |
1:20.81 |
1:18.67 |
-2.14 |
| 4 |
Fox, Scarlet (12)
|
MRMAKO |
1:23.73 |
1:22.97 |
-0.76 |
| 5 |
Gross, Lisa L (11)
|
MRYFD |
1:26.77 |
1:24.79 |
-1.98 |
| 6 |
van der Paardt, Leah S (12)
|
MRYFD |
1:30.33 |
1:27.08 |
-3.25 |
| 7 |
Reed, Claire K (11)
|
MRTRI |
1:28.92 |
1:29.33 |
0.41 |
| 8 |
Boyle, Aoibhin S (12)
|
MRYFD |
1:27.51 |
1:30.09 |
2.58 |
| 9 |
Grant, Isabella E (12)
|
MRYFD |
1:24.82 |
1:31.16 |
6.34 |
| 10 |
Laguardia, Rafaela S (11)
|
MRMAKO |
1:59.68 |
1:33.42 |
-26.26 |
| 11 |
Carpenito, Ella (11)
|
MRTRI |
1:40.00 |
1:33.98 |
-6.02 |
| 12 |
Iwerks, Cambria L (12)
|
MRYFD |
1:30.18 |
1:34.99 |
4.81 |
| 13 |
Valazzi, Vienna (12)
|
MRMAKO |
1:39.34 |
1:37.03 |
-2.31 |
| 14 |
Titievsky, Zoe F (12)
|
MRBKR |
1:41.72 |
1:37.25 |
-4.47 |
| 15 |
Zuretti, Matilde (11)
|
MRYFD |
1:39.65 |
1:37.34 |
-2.31 |
| 16 |
Thompson, Maya N (11)
|
MRBKR |
1:45.63 |
1:38.31 |
-7.32 |
| 17 |
Perloff, Lucy (12)
|
MRMAKO |
1:34.38 |
1:39.13 |
4.75 |
| 18 |
Aronson, Scarlett (12)
|
MRMAKO |
1:38.45 |
1:40.53 |
2.08 |
| 19 |
Oyola, Edalene F (11)
|
MRKBM |
1:40.15 |
1:44.82 |
4.67 |
| 20 |
Altschul, Helena L (12)
|
MRYFD |
1:46.91 |
1:47.17 |
0.26 |
| 21 |
Guidera, Ava M (11)
|
MRTRI |
1:50.00 |
1:49.53 |
-0.47 |
| 22 |
Farbman, Malin S (11)
|
MRMAKO |
1:50.77 |
2:00.21 |
9.44 |
|
Reyl, Iris T (11)
|
MRYFD |
1:52.83 |
DQ |
- |
|
Palmieri, Beatrice N (12)
|
MRTRI |
1:23.91 |
NS |
- |
|
Rafla, Jounir (11)
|
MRTRI |
1:50.11 |
NS |
- |