| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 51.32 | Sholl, Jacob (2015) (Carthage Illini West, IL) | Illinois Top Times Championships - Class 1A(IL), 2014-03-28(#1) |
| B-400 | 2 | 51.61 | Fox, Tristan (2014) (Lena-Winslow, IL) | Tri-State Invitational - Small Schools(WI), 2014-03-22(#1) |
| B-400 | 3 | 51.75 | Kidwell, Austin (2014) (Watseka Comm, IL) | Illinois Top Times Championships - Class 2A(IL), 2014-03-29(#4) |
| B-400 | 4 | 51.88 | Flynn, Morgan (2014) (Williamsville, IL) | Illinois Top Times Championships - Class 1A(IL), 2014-03-28(#3) |
| B-400 | 5 | 52.48 | Hennig, Joshua (2014) (Springfield Lutheran, IL) | Illinois Top Times Championships - Class 1A(IL), 2014-03-28(#4) |
| B-400 | 6 | 52.69 | Blievernicht, Kyle (2014) (Teutopolis, IL) | Charleston HS Boys Invitational - Small Schools(IL), 2014-03-22(#3) |
| B-400 | 7 | 52.85 | Singleton, Kurterry (2014) (Holy Trinity, IL) | Illinois Top Times Championships - Class 1A(IL), 2014-03-28(#6) |
| B-400 | 8 | 53.03 | Lawrence, John (2014) (ROWVA, IL) | Titan Invitational(IL), 2014-03-18(#2) |
| B-400 | 9 | 53.14 | Evans, John (2014) (Tuscola, IL) | Illinois Top Times Championships - Class 1A(IL), 2014-03-28(#8) |
| B-400 | 10 | 53.23 | Skinner, Preston (2015) (Shiloh, IL) | Illinois Top Times Championships - Class 1A(IL), 2014-03-28(#9) |
| B-400 | 11 | 53.46 | Leigh, Chris (2014) (Fieldcrest, IL) | Illinois State HS Invitational(IL), 2014-03-08(#4) |
| B-400 | 12 | 53.70 | Durbin, Seth (2016) (Shelbyville, IL) | SIU Boys HS Invitational(IL), 2014-03-08(#8) |
| B-400 | 13 | 53.79 | Vancil, Zach (2017) (West Central, IL) | Silver Streak Last Chance Invitational(IL), 2014-03-22(#1) |
| B-400 | 14 | 53.87 | Pokalsey, Jason (2014) (Central A & M, IL) | Charleston HS Boys Invitational - Small Schools(IL), 2014-03-22(#6) |
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| | | See more performances for B-400 | | |
