Time | Date | Name | Team | Meet |
---|---|---|---|---|
54.64 | Nov. 11, 2022 | Milena Busma | Adlai E Stevenson School | IHSA Girls State Championships |
54.77 | Nov. 5, 2022 | Milena Busma | Adlai E Stevenson School | IHSA Girls Sectionals - Lincolnshire |
54.94 | Nov. 10, 2018 | Emma Gleason | Libertyville High School | IHSA Sectionals - Lake Forest (Girls) |