| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 49.52 | Swanson, Jeff (2014) (Winnebago, IL) | IL 2A Sterling Boys Sectional(IL), 2013-05-17(#3) |
| B-400 | 2 | 49.61 | Williamson, Derek (2013) (Neoga, IL) | National Trail Conference(IL), 2013-04-30(#1) |
| B-400 | 3 | 49.62 | Lawrence, John (2014) (ROWVA, IL) | IL 1A Sherrard Boys Sectional(IL), 2013-05-17(#2) |
| B-400 | 4 | 49.87 | Doll, Tim (2014) (Westmont, IL) | IL 1A Boys State Finals(IL), 2013-05-25(#2) |
| B-400 | 5 | 50.13 | Pokalsey, Jason (2014) (Central A & M, IL) | IL 1A Boys State Prelims(IL), 2013-05-23(#2) |
| B-400 | 6 | 50.19 | Sellers, Tevin (2013) (Lena-Winslow, IL) | IL 1A Oregon Boys Sectional(IL), 2013-05-17(#1) |
| B-400 | 7 | 50.27 | Snell, Zeke (2014) (Goreville, IL) | IL 1A Boys State Prelims(IL), 2013-05-23(#5) |
| B-400 | 8 | 50.28 | Harrell, Johnathan (2014) (Aurora Christian, IL) | AAU Area 14 National Qualifier(IL), 2013-06-09(#2) |
| B-400 | 9 | 50.44 | Hipsskind, Tim (2013) (Immaculate Conception, IL) | IL 1A Lisle Boys Sectional(IL), 2013-05-17(#2) |
| B-400 | 10 | 50.55 | Flynn, Morgan (2014) (Williamsville, IL) | IL 1A Eureka Boys Sectional(IL), 2013-05-16(#1) |
| B-400 | 11 | 50.59 | Pogioli, Zach (2013) (Deer Creek Mackinaw, IL) | IL 1A Eureka Boys Sectional(IL), 2013-05-16(#2) |
| B-400 | 12 | 50.71 | Newman, Garrett (2013) (Oregon, IL) | Carlson Hawk Classic(IL), 2013-04-27(#2) |
| B-400 | 13 | 50.80 | Gullstrand, Jake (2013) (Indian Creek, IL) | IL 1A Seneca Boys Sectional(IL), 2013-05-17(#1) |
| B-400 | 14 | 51.02 | Larimore, Eli (2015) (Tremont, IL) | IL 1A Eureka Boys Sectional(IL), 2013-05-16(#3) |
| B-400 | 15 | 51.09 | Rude, Brady (2016) (Sterling Newman, IL) | TRAC-8 Conference Meet(IL), 2013-05-10(#1) |
| B-400 | 16 | 51.16 | Bahls, Montana (2013) (Dakota, IL) | IL 1A Oregon Boys Sectional(IL), 2013-05-17(#3) |
| B-400 | 17 | 51.22 | Kirby, Josh (2015) (Peoria Christian, IL) | IL 1A Eureka Boys Sectional(IL), 2013-05-16(#4) |
| B-400 | 18 | 51.27 | Blievernicht, Kyle (2014) (Teutopolis, IL) | IL 1A Boys State Prelims(IL), 2013-05-23(#11) |
| B-400 | 19 | 51.52 | Singleton, Kurterry (2014) (Holy Trinity, IL) | IL 1A Lisle Boys Sectional(IL), 2013-05-17(#3) |
| B-400 | 20 | 51.61 | Hubble, Colt (2014) (North Macoupin, IL) | Capital Area Classic(IL), 2013-05-13(#2) |
| B-400 | 21 | 51.71 | Smith, Luke (2013) (Waverly, IL) | Capital Area Classic(IL), 2013-05-13(#3) |
| B-400 | 22 | 51.72 | Johnson, Cole (2013) (St. Joseph-Ogden, IL) | IL 1A Tolono Unity Boys Sectional(IL), 2013-05-17(#1) |
| B-400 | 23 | 51.73 | Page, Jackson (2014) (Springfield Lutheran, IL) | Capital Area Classic(IL), 2013-05-13(#4) |
| B-400 | 24 | 51.77 | Blickhan, Alex (2014) (Unity, IL) | IL 1A Beardstown Boys Sectional(IL), 2013-05-17(#1) |
| B-400 | 25 | 51.79 | Kissner, Jake (2014) (Sherrard, IL) | IL 1A Sherrard Boys Sectional(IL), 2013-05-17(#3) |
| B-400 | 26 | 51.84 | Gadson, Brandon (2014) (Mooseheart, IL) | IL 1A Seneca Boys Sectional(IL), 2013-05-17(#2) |
| B-400 | 27 | 51.88 | Frazer, Andrew (2015) (Chester, IL) | Monroe/Randolph Bi-County Meet(IL), 2013-04-23(#1) |
| B-400 | 28 | 51.93 | Wolf, Stuart (Harvest Christian, IL) | IL 1A Seneca Boys Sectional(IL), 2013-05-17(#3) |
| B-400 | 29 | 52.01 | Oakley, Tyler (2014) (Lena-Winslow, IL) | Carlson Hawk Classic(IL), 2013-04-27(#4) |
| B-400 | 30 | 52.02 | Meunier, Nicholas (2016) (Gibson City-Melvin-Sibley, IL) | Monticello Boys Invitational(IL), 2013-04-12(#1) |
| B-400 | 31 | 52.06 | Hale, Blake (2013) (Robinson, IL) | Olney Invitational(IL), 2013-04-05(#2) |
| B-400 | 32 | 52.14 | Anderson, Austin (2013) (Orion, IL) | IL 1A Sherrard Boys Sectional(IL), 2013-05-17(#4) |
| B-400 | 33 | 52.21 | Gilstrap, Steven (2016) (Farmington, IL) | Roger Washburn Invitational(IL), 2013-04-26(#3) |
| B-400 | 34 | 52.24 | Mueller, J.P. (2014) (Southwestern, IL) | Rochester Co-Ed Invitational(IL), 2013-04-20(#2) |
| B-400 | 35 | 52.25 | Galaviz, Fedrico (2015) (Arcola, IL) | Tuscola Open(IL), 2013-04-22(#2) |
| B-400 | 36 | 52.32 | Schoonover, Will (2016) (Havana, IL) | IL 1A Eureka Boys Sectional(IL), 2013-05-16(#6) |
| B-400 | 37 | 52.34 | Lee, Dallas (2014) (Heyworth, IL) | IL 1A Boys State Prelims(IL), 2013-05-23(#20) |
| B-400 | 38 | 52.35 | Mills, Brandon (2013) (Tuscola, IL) | Tuscola Open(IL), 2013-04-22(#3) |
| B-400 | 39 | 52.41 | Sorrill, Jacob (2013) (Liberty, IL) | IL 1A Beardstown Boys Sectional(IL), 2013-05-17(#2) |
| B-400 | 40 | 52.44 | Reicheneker, Collin (2014) (Elmwood-Brimfield, IL) | IL 1A Sherrard Boys Sectional(IL), 2013-05-17(#5) |
| B-400 | 41 | 52.50 | Hennig, Joshua (2014) (Springfield Lutheran, IL) | IL 1A Eureka Boys Sectional(IL), 2013-05-16(#7) |
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| | | See more performances for B-400 | | |
