| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Pratt, Olivia A (12)
|
NMLCAT |
35.89 |
36.13 |
0.24 |
| 2 |
Rivera Carrillo, Mabel (11)
|
TIB |
41.07 |
38.94 |
-2.13 |
| 3 |
Cosgrove, Ella R (11)
|
AZFORD |
39.20 |
39.49 |
0.29 |
| 4 |
Mata, Mia I (12)
|
BDSWAT |
40.95 |
40.07 |
-0.88 |
| 5 |
Beardsley, Jillian M (12)
|
AZFAST |
41.23 |
40.30 |
-0.93 |
| 6 |
Smith, Wren S (11)
|
AZFORD |
42.15 |
41.41 |
-0.74 |
| 7 |
Manfredi, Oriana C (11)
|
AZJSC |
42.76 |
42.41 |
-0.35 |
| 8 |
Switzer, Zoey M (11)
|
AZFORD |
42.37 |
42.48 |
0.11 |
| 9 |
Slater, Athena F (12)
|
BDSWAT |
43.59 |
43.07 |
-0.52 |
| 10 |
Smith, Ruby A (11)
|
AZFORD |
43.26 |
43.29 |
0.03 |
| 11 |
Soto-Ruiz, Mikaela R (11)
|
BDRAST |
43.97 |
44.01 |
0.04 |
| 12 |
Ruiz Coronado, Francia (11)
|
TIB |
40.33 |
46.42 |
6.09 |
|
Gallardo Medina, Maria Jose (12)
|
CENA |
40.89 |
NS |
- |