| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Johnson, Hannah E (13)
|
ILECST |
18:14.22 |
18:07.30 |
-6.92 |
| 2 |
Cherwin, Jillian A (14)
|
ILECST |
18:25.43 |
18:19.95 |
-5.48 |
| 3 |
Rezabek, Elaina D (14)
|
ILECST |
19:13.41 |
18:42.09 |
-31.32 |
| 4 |
Sheldon, Abigael P (13)
|
ILTIDE |
19:57.53 |
20:26.17 |
28.64 |
| 5 |
Raetzke, Hannah M (13)
|
ILDCST |
22:16.16 |
20:35.71 |
-100.45 |
| 6 |
Hurliman, Tanner K (12)
|
ILMARL |
23:43.96 |
20:53.75 |
-170.21 |
| 7 |
Owen, Kaitlyn E (12)
|
ILMARL |
23:16.62 |
21:25.75 |
-110.87 |
| 8 |
Prais-Lewis, Edith L (14)
|
ILDCST |
|
21:58.13 |
- |
| 9 |
Purdy, Payton L (13)
|
ILSSSC |
22:16.92 |
22:08.03 |
-8.89 |
| 10 |
Williams, Emma R (14)
|
ILFVFY |
22:53.64 |
22:18.54 |
-35.10 |
| 11 |
Mick, Keeley B (13)
|
ILSSSC |
|
22:25.72 |
- |
| 12 |
Alberts, Danielle R (11)
|
ILMARL |
25:22.94 |
23:36.84 |
-106.10 |
| 13 |
Kraft, Ella J (11)
|
ILMARL |
24:47.90 |
23:39.38 |
-68.52 |
| 14 |
Karolewicz, Ava M (14)
|
ILDCST |
23:52.47 |
23:45.87 |
-6.60 |
| 15 |
Reid, Erin G (10)
|
ILECST |
25:05.11 |
23:59.94 |
-65.17 |
| 16 |
Redden, Ella L (12)
|
ILRMSC |
|
24:19.52 |
- |
| 17 |
Hastings, Samantha M (14)
|
ILDCST |
26:30.44 |
25:15.39 |
-75.05 |
| 18 |
Robbins, Anna Elizabeth F (14)
|
ILDCST |
|
28:02.83 |
- |