| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Ma, Sally (15)
|
ILHEAT |
51.13 |
53.77 |
2.64 |
| 2 |
Hurst, Abby M (14)
|
ILYDSC |
59.15 |
57.14 |
-2.01 |
| 3 |
DeSalle, Elizabeth G (18)
|
ILSPY |
54.78 |
57.20 |
2.42 |
| 4 |
Broaders, Reed (17)
|
ILHEAT |
52.76 |
58.57 |
5.81 |
| 5 |
Mansfield, Madilynn E (14)
|
ILYDSC |
1:01.49 |
1:00.99 |
-0.50 |
| 6 |
Quinn, Ashlyn (19)
|
WCY |
1:00.05 |
1:01.08 |
1.03 |
| 7 |
Hinshaw, Rebecca (11)
|
WCY |
1:04.99 |
1:04.54 |
-0.45 |
| 8 |
Scott, Annika M (15)
|
ILHEAT |
1:04.52 |
1:05.12 |
0.60 |
| 9 |
Stoffel, Cassidee G (11)
|
ILHEAT |
1:04.39 |
1:06.95 |
2.56 |
| 10 |
Londrigan, Alice E (11)
|
ILSPY |
1:05.23 |
1:07.90 |
2.67 |
| 11 |
Bruere, Ella (13)
|
ILJAXY |
1:16.02 |
1:13.03 |
-2.99 |
| 12 |
Lundin, Ella (10)
|
ILCCY |
1:18.71 |
1:13.74 |
-4.97 |
| 13 |
Warren, Faith (10)
|
ILKNCY |
1:18.04 |
1:16.44 |
-1.60 |
| 14 |
Meier, Kenna R (10)
|
ILSPY |
1:16.72 |
1:17.25 |
0.53 |
| 15 |
Foster, Kendall R (10)
|
ILSPY |
1:19.86 |
1:17.61 |
-2.25 |
| 16 |
Courson, Isabella (13)
|
ILDANY |
1:23.56 |
1:17.87 |
-5.69 |
| 17 |
Lengacher, Amelia K (14)
|
ILSPY |
1:23.88 |
1:20.93 |
-2.95 |
| 18 |
Allen, Lilly M (10)
|
ILSPY |
1:21.43 |
1:22.53 |
1.10 |
|
Lamb, Jemma J (9)
|
ILSPY |
1:23.99 |
NS |
- |