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| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 43.68 | March 13, 2021 | Connor Boyle | Neuqua Valley High School | DVC Championship Varsity |
| 43.82 | Feb. 28, 2020 | Connor Boyle | Neuqua Valley High School | IHSA Boys State Championship |
| 44.78 | Feb. 22, 2020 | Connor Boyle | Neuqua Valley High School | IHSA Boys Sectional Championship - Metea Valley |
| 45.45 | Dec. 21, 2019 | Connor Boyle | Neuqua Valley High School | Neuqua Valley Invitational |
| 50.94 | Dec. 13, 2019 | Goncalo Wanzeller | Naperville Central High School | New Trier vs. Naperville Central |
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