| Rank | Time | Student | Grade | School | Year | |
| 1 | 1:25.13 | | | Rock Bridge | 2024 | Class 5 |
| 2 | 1:25.50 | | | Lee's Summit North | 2023 | Class 5 |
| 3 | 1:25.62 | | | Hazelwood Central | 2007 | Class 4 |
| 4 | 1:25.76 | | | McCluer North | 2007 | |
| 5 | 1:26.11 | | | St. Louis University | 2006 | Prelims |
| 6 | 1:26.20 | | | Hazelwood Central | 2008 | Prelims |
| 7 | 1:26.25 | | | Ritenour | 1989 | |
| 8 | 1:26.70 | | | Lift for Life Academy Charter | 2024 | Class 3 |
| 9 | 1:27.08 | | | McCluer South-Berkeley | 2010 | Class 3 |
| 10 | 1:27.29 | | | Vashon | 2003 | Class 3 |
| 11 | 1:28.27 | | | Maplewood-Richmond Hts. | 2009 | Class 2 |
| 12 | 1:30.81 | | | Hayti | 2022 | Class 1 |