| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Walker, Lucy E (15)
|
MRBGNW |
52.52 |
52.69 |
0.17 |
| 2 |
Lee, Lauren C (14)
|
MRBAD |
52.68 |
52.78 |
0.10 |
| 3 |
Egan, Orla M (17)
|
MRBAD |
53.56 |
55.57 |
2.01 |
| 4 |
Loveless, MaryKate (16)
|
MRBAD |
54.87 |
56.46 |
1.59 |
| 5 |
Rocco, Emily A (17)
|
MRBGNW |
54.40 |
56.65 |
2.25 |
| 6 |
Slive, Ellie R (15)
|
MRBGNW |
56.38 |
57.86 |
1.48 |
| 7 |
McIntyre, Savannah Y (16)
|
MRBGNW |
57.45 |
58.30 |
0.85 |
| 8 |
Alexander, Sinceraty D (17)
|
MRBGNW |
54.75 |
58.99 |
4.24 |
| 8 |
Chung, Zoe E (13)
|
MRBGNW |
59.07 |
58.99 |
-0.08 |
| 10 |
Solomon, Mirabel K (14)
|
MRBGNW |
1:00.14 |
59.19 |
-0.95 |
| 11 |
Dillane, Chloe J (15)
|
MRBGNW |
1:01.12 |
59.86 |
-1.26 |
| 12 |
Patterson, Clare M (16)
|
MRBGNW |
57.29 |
59.87 |
2.58 |
| 13 |
Raath, Ella (17)
|
MRBGNW |
58.58 |
1:00.99 |
2.41 |
| 14 |
Tello, Lizette (16)
|
MRBGNW |
1:03.50 |
1:03.91 |
0.41 |
| 15 |
Sun, Julia (15)
|
MRBGNW |
59.18 |
1:06.29 |
7.11 |
| 16 |
Tsang, Jessica (15)
|
MRBGNW |
1:03.51 |
1:06.97 |
3.46 |
| 17 |
Naughton, Kiera H (14)
|
MRBGNW |
58.64 |
1:09.18 |
10.54 |
|
Paez, Isabella S (16)
|
MRBGNW |
53.37 |
NS |
- |
|
Cornish, Kristin A (16)
|
MRBAD |
52.02 |
NS |
- |