| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Franckowiak, Kali M (17)
|
ILMAVS |
18:18.73 |
18:21.86 |
3.13 |
| 2 |
Wessel, Holly A (16)
|
ILWHTN |
17:40.80 |
18:54.39 |
73.59 |
| 3 |
Hamilton, Faith M (16)
|
ILWHTN |
18:29.17 |
19:20.29 |
51.12 |
| 4 |
Showalter, Cadence M (16)
|
ILMAVS |
18:57.46 |
19:42.69 |
45.23 |
| 5 |
Kellett, Mikayla A (12)
|
ILSCST |
19:56.52 |
19:49.12 |
-7.40 |
| 6 |
Larson, Marguerite L (15)
|
ILWHTN |
17:17.24 |
20:20.78 |
183.54 |
| 7 |
Kirkman, Holly * (14)
|
ILWHTN |
|
20:29.60 |
- |
| 8 |
White, Camille R (14)
|
ILWHTN |
21:45.08 |
20:30.08 |
-75.00 |
| 9 |
Rooney, Norah C (13)
|
ILSCST |
21:58.34 |
21:38.16 |
-20.18 |
|
Gould, Joanna M (16)
|
ILHSC |
19:06.24 |
DQ |
- |