| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Herbert, Owain G (16)
|
MAMERC |
54.59 |
54.30 |
-0.29 |
| 2 |
Gutterman, Hunter M (14)
|
MRNDAC |
57.01 |
56.16 |
-0.85 |
| 3 |
Button, Samuel M (13)
|
MRNDAC |
59.07 |
58.30 |
-0.77 |
| 4 |
Burda, Sophia J (18)
|
MRUN |
57.25 |
1:01.42 |
4.17 |
| 5 |
Chen-Suzuki, Keizo N (14)
|
MRNDAC |
1:04.17 |
1:01.62 |
-2.55 |
| 6 |
Heidebrecht, Martin H (14)
|
MRNDAC |
1:05.57 |
1:02.91 |
-2.66 |
| 7 |
Button, Molly I (13)
|
MRNDAC |
1:06.87 |
1:04.69 |
-2.18 |
| 8 |
Smith, Charlotte T (15)
|
MRNDAC |
1:01.74 |
1:05.64 |
3.90 |
| 9 |
Hewitt, Allison C (14)
|
MRNDAC |
1:07.94 |
1:07.47 |
-0.47 |
| 10 |
Meddaugh, Brock W (13)
|
MRNDAC |
1:12.42 |
1:12.65 |
0.23 |
| 11 |
Hayes, Chloe E (14)
|
MRNDAC |
|
1:20.65 |
- |