| Rank | Event | Best Time | Standard | P/F/T | Swim Date | Meet Name |
| Blair, Camryn (Girl 17) [Standard: SC Nationals (Matches or Exceeds [Nationals])] |
| 1 | 50 Free | 24.64Y | Nationals | F | 03/10/2018 | IL Y State Championship |
| DeSalle, Elizabeth (Girl 17) [Standard: SC Nationals (Matches or Exceeds [Nationals])] |
| 1 | 200 Fly | 2:08.70Y | Nationals | P | 04/07/2018 | Y National Championship |
| Preski, Kendra (Girl 17) [Standard: SC Nationals (Matches or Exceeds [Nationals])] |
| 1 | 100 Free | 51.95YL | Nationals | F | 04/04/2018 | Y National Championship |
| 1 | 200 Free | 1:51.27YL | Nationals | F | 04/06/2018 | Y National Championship |
| 1 | 500 Free | 5:00.28Y | Nationals | F | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 1000 Free | 10:13.67Y | Nationals | F | 04/03/2018 | Y National Championship |
| 1 | 1650 Free | 17:01.81Y | Nationals | F | 03/09/2018 | IL Y State Championship |
| 1 | 200 Back | 2:03.17Y | Nationals | F | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 100 Fly | 56.97Y | Nationals | F | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 200 Fly | 2:05.42Y | Nationals | F | 03/11/2018 | IL Y State Championship |
| Van Berkom, Megan (Girl 17) [Standard: SC Nationals (Matches or Exceeds [Nationals])] |
| 1 | 100 Breast | 1:04.07Y | Nationals | F | 10/27/2018 | IFLY Speedo Midwest Challenge |
| 1 | 200 Breast | 2:15.62Y | Nationals | F | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 100 Fly | 57.32Y | Nationals | F | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 200 Fly | 2:03.42Y | Nationals | F | 10/27/2018 | IFLY Speedo Midwest Challenge |
| 1 | 200 IM | 2:01.69Y | Nationals | F | 04/06/2018 | Y National Championship |
| 1 | 400 IM | 4:17.48Y | Nationals | F | 04/05/2018 | Y National Championship |
| Viele, Olivia (Girl 15) [Standard: SC Nationals (Matches or Exceeds [Nationals])] |
| 1 | 100 Back | 59.11Y | Nationals | P | 04/05/2018 | Y National Championship |
| Wheeler, Kaitlynn (Girl 18) [Standard: SC Nationals (Matches or Exceeds [Nationals])] |
| 1 | 50 Free | 23.64YL | Nationals | F | 03/11/2018 | IL Y State Championship |
| 1 | 100 Free | 50.88Y | Nationals | F | 03/11/2018 | IL Y State Championship |
| 1 | 200 Free | 1:48.18Y | Nationals | F | 10/27/2018 | IFLY Speedo Midwest Challenge |
| 1 | 500 Free | 4:49.99Y | Nationals | F | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 1000 Free | 10:04.88Y | Nationals | F | 04/07/2018 | Y National Championship |
| 1 | 1650 Free | 16:37.76Y | Nationals | F | 04/07/2018 | Y National Championship |
| 1 | 100 Back | 55.60Y | Nationals | F | 10/27/2018 | IFLY Speedo Midwest Challenge |
| 1 | 200 Back | 1:58.04Y | Nationals | P | 04/04/2018 | Y National Championship |
| 1 | 100 Breast | 1:07.10Y | Nationals | F | 10/07/2018 | SPY Season Opener |
| 1 | 200 Breast | 2:24.89Y | Nationals | F | 10/06/2018 | SPY Season Opener |
| 1 | 100 Fly | 55.39Y | Nationals | F | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 200 Fly | 2:06.56Y | Nationals | F | 10/07/2018 | SPY Season Opener |
| 1 | 200 IM | 1:59.39Y | Nationals | F | 04/06/2018 | Y National Championship |
| 1 | 400 IM | 4:14.50Y | Nationals | F | 04/05/2018 | Y National Championship |
| Hohm, Stuart (Boy 22) [Standard: SC Nationals (Matches or Exceeds [Nationals])] |
| 1 | 100 Free | 46.14Y | Nationals | P | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 200 Free | 1:41.38Y | Nationals | F | 10/27/2018 | IFLY Speedo Midwest Challenge |
| Kindel, Michael (Boy 15) [Standard: SC Nationals (Matches or Exceeds [Nationals])] |
| 1 | 500 Free | 4:41.72Y | Nationals | F | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 1000 Free | 9:42.60Y | Nationals | F | 10/26/2018 | IFLY Speedo Midwest Challenge |
| 1 | 1650 Free | 16:08.11Y | Nationals | F | 10/26/2018 | IFLY Speedo Midwest Challenge |
| Knox, Matthew (Boy 18) [Standard: SC Nationals (Matches or Exceeds [Nationals])] |
| 1 | 50 Free | 20.97YL | Nationals | P | 04/05/2018 | Y National Championship |
| 1 | 100 Free | 45.43Y | Nationals | F | 04/07/2018 | Y National Championship |
| 1 | 200 Free | 1:40.09Y | Nationals | P | 04/05/2018 | Y National Championship |
| 1 | 500 Free | 4:35.98Y | Nationals | P | 04/06/2018 | Y National Championship |
| 1 | 1650 Free | 16:06.57Y | Nationals | F | 03/09/2018 | IL Y State Championship |
| 1 | 100 Breast | 1:00.74Y | Nationals | F | 03/10/2018 | IL Y State Championship |
| 1 | 100 Fly | 50.96Y | Nationals | F | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 200 Fly | 1:57.18Y | Nationals | F | 03/11/2018 | IL Y State Championship |
| 1 | 200 IM | 1:53.92Y | Nationals | P | 10/27/2018 | IFLY Speedo Midwest Challenge |
| 1 | 400 IM | 4:05.37Y | Nationals | F | 10/26/2018 | IFLY Speedo Midwest Challenge |
| Milling, Adam (Boy 16) [Standard: SC Nationals (Matches or Exceeds [Nationals])] |
| 1 | 100 Free | 47.11YL | Nationals | F | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 500 Free | 4:44.40Y | Nationals | F | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 100 Back | 53.65Y | Nationals | P | 10/27/2018 | IFLY Speedo Midwest Challenge |
| 1 | 100 Breast | 56.97Y | Nationals | F | 10/27/2018 | IFLY Speedo Midwest Challenge |
| 1 | 200 Breast | 2:04.92Y | Nationals | F | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 200 IM | 1:53.00Y | Nationals | F | 10/27/2018 | IFLY Speedo Midwest Challenge |
| 1 | 400 IM | 4:02.28Y | Nationals | F | 10/26/2018 | IFLY Speedo Midwest Challenge |
| Moulton, Evan (Boy 17) [Standard: SC Nationals (Matches or Exceeds [Nationals])] |
| 1 | 200 Free | 1:44.85Y | Nationals | F | 10/27/2018 | IFLY Speedo Midwest Challenge |
| 1 | 200 Back | 1:55.26Y | Nationals | P | 04/04/2018 | Y National Championship |
| 1 | 100 Fly | 52.84Y | Nationals | P | 10/28/2018 | IFLY Speedo Midwest Challenge |
| 1 | 200 Fly | 1:56.80Y | Nationals | P | 10/27/2018 | IFLY Speedo Midwest Challenge |
| 1 | 400 IM | 4:11.27Y | Nationals | F | 10/26/2018 | IFLY Speedo Midwest Challenge |
| Patton, Michael (Boy 18) [Standard: SC Nationals (Matches or Exceeds [Nationals])] |
| 1 | 50 Free | 21.92Y | Nationals | P | 04/06/2018 | Y National Championship |
| 1 | 100 Free | 47.47Y | Nationals | F | 03/11/2018 | IL Y State Championship |
| 1 | 100 Back | 51.46Y | Nationals | F | 03/11/2018 | IL Y State Championship |
| 1 | 100 Fly | 51.14Y | Nationals | P | 04/04/2018 | Y National Championship |
| 1 | 200 Fly | 1:53.86Y | Nationals | P | 04/07/2018 | Y National Championship |