| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Saybolt, Elanor H (14)
|
PVNCAP |
17:54.22 |
17:56.80 |
2.58 |
| 2 |
Nguyen, Lien J (14)
|
PVPM |
18:28.71 |
18:17.01 |
-11.70 |
| 3 |
Ivanovskaya, Taisiya (14)
|
PVRMSC |
18:33.67 |
18:33.51 |
-0.16 |
| 4 |
Gudana, Sophie I (14)
|
PVNCAP |
19:21.38 |
18:33.57 |
-47.81 |
| 5 |
Ossi, Hope A (13)
|
PVRMSC |
18:25.27 |
18:55.71 |
30.44 |
| 6 |
Ossi, Chloe C (13)
|
PVRMSC |
18:39.05 |
19:12.46 |
33.41 |
| 7 |
Buckley, Olivia L (14)
|
PVNCAP |
18:40.11 |
19:25.22 |
45.11 |
| 8 |
Begley, Adeline M (14)
|
PVNCAP |
19:32.78 |
19:41.15 |
8.37 |
| 9 |
Das, Uma U (14)
|
PVSDS |
19:42.60 |
19:49.53 |
6.93 |
| 10 |
Southerling, Shawn M (14)
|
PVASA |
19:35.13 |
19:50.61 |
15.48 |
| 11 |
Simmons, Victoria A (13)
|
PVOCCS |
19:34.26 |
19:59.02 |
24.76 |
| 12 |
Harper, Grace E (14)
|
PVOCCS |
19:41.28 |
20:09.29 |
28.01 |
| 13 |
Schur, Gracelyn K (13)
|
PVRMSC |
20:39.76 |
20:20.29 |
-19.47 |
| 14 |
McGee, Grace V (13)
|
PVASA |
20:12.16 |
20:20.74 |
8.58 |
| 15 |
French, Alena M (14)
|
PVOCCS |
20:38.19 |
20:37.60 |
-0.59 |
| 16 |
Snyder, Emma G (14)
|
PVOCCS |
20:49.73 |
21:05.67 |
15.94 |