| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Sohn, Sora (17)
|
MRBGNW |
1:07.13 |
1:07.69 |
0.56 |
| 2 |
Guzzino, Mary Grace S (15)
|
MRBGNW |
1:06.18 |
1:08.75 |
2.57 |
| 3 |
Egan, Orla M (17)
|
MRBAD |
1:10.12 |
1:08.83 |
-1.29 |
| 4 |
Bondikov, Sophia E (13)
|
MRUN |
1:09.40 |
1:09.15 |
-0.25 |
| 5 |
Walker, Lucy E (15)
|
MRBGNW |
1:08.00 |
1:09.33 |
1.33 |
| 6 |
Dougherty, Kate A (15)
|
MRBAD |
1:13.87 |
1:14.27 |
0.40 |
| 7 |
Blakeslee, Kaitlin P (17)
|
MRBGNW |
1:11.61 |
1:14.60 |
2.99 |
| 8 |
Dillane, Chloe J (15)
|
MRBGNW |
1:17.47 |
1:17.53 |
0.06 |
| 9 |
Smith, Alexandria K (16)
|
MRBGNW |
1:18.17 |
1:17.84 |
-0.33 |
| 10 |
Williams, Laura A (15)
|
MRBGNW |
1:25.88 |
1:27.05 |
1.17 |