| Event | Rank | Mark | By | Meet |
| B-400 | 1 | 50.15 | Harris, Aaron (2016) (Lisle, IL) | Arkansas HS Invitational(AR), 2015-01-17(#14) |
| | | National Elites above. State Elites below | | |
| B-400 | 2 | 50.45 | Lyons, Tyran (2016) (Cahokia, IL) | Arkansas HS Invitational(AR), 2015-01-17(#18) |
| B-400 | 3 | 50.48 | Blankenship, Sam (2015) (Johnsburg, IL) | Illinois Top Times Championships - Class 2A(IL), 2015-03-28(#1) |
| B-400 | 4 | 50.55 | Higgins, Tyler (2017) (Highland, IL) | Illinois Top Times Championships - Class 2A(IL), 2015-03-28(#2) |
| B-400 | 5 | 51.35 | Charlton, Brett (2015) (Eureka, IL) | Normal West Boys Invitational(IL), 2015-02-28(#1) |
| B-400 | 6 | 51.63 | Shadid, David (2015) (Notre Dame, IL) | Illinois Top Times Championships - Class 2A(IL), 2015-03-28(#4) |
| B-400 | 7 | 51.77 | Moore, Will (2015) (Metamora, IL) | Illinois Top Times Championships - Class 2A(IL), 2015-03-28(#5) |
| B-400 | 8 | 51.85 | Stanley, Chris (2017) (Cahokia, IL) | Arkansas HS Invitational(AR), 2015-01-17(#38) |
| B-400 | 9 | 51.90 | Mcgee, Chris (2016) (Cahokia, IL) | Arkansas HS Invitational(AR), 2015-01-17(#39) |
| B-400 | 10 | 51.95 | Williams, Charles (2015) (Johnson College Prep, IL) | Illinois Top Times Championships - Class 2A(IL), 2015-03-28(#6) |
| B-400 | 10 | 51.95 | Victoria, Michael (2015) (Harrisburg, IL) | SIU Boys HS Invitational(IL), 2015-03-07(#3) |
| B-400 | 12 | 51.97 | Redmond, Jerome (2015) (Dusable, IL) | Illinois Top Times Championships - Class 2A(IL), 2015-03-28(#7) |
| B-400 | 13 | 52.02 | Tomaszewski, Kai (2016) (Princeton, IL) | Galesburg Silver Streak Invitational(IL), 2015-03-21(#1) |
| B-400 | 13 | 52.02 | Porter, Aaron (2017) (Marion, IL) | Illinois Top Times Championships - Class 2A(IL), 2015-03-28(#8) |
| B-400 | 15 | 52.41 | Slovak, Eric (2015) (Vernon Hills, IL) | Illinois Top Times Championships - Class 2A(IL), 2015-03-28(#11) |
| B-400 | 16 | 52.47 | Downing, Denzel (2016) (Saint Viator, IL) | Kent State HS Open #2(OH), 2015-01-31(#6) |
| B-400 | 17 | 52.57 | Haynes, Joshua (2015) (Marian Catholic, IL) | De La Salle Invitational #2(IL), 2015-02-21(#1) |
| B-400 | 18 | 52.78 | Raymond, Chris (2016) (Cahokia, IL) | Arkansas HS Invitational(AR), 2015-01-17(#57) |
| B-400 | 19 | 53.01 | Miller, Dillon (2015) (Jacksonville, IL) | Gene Armer Invitational(IL), 2015-03-21(#5) |
| B-400 | 20 | 53.10 | Johnson, Tyler (2015) (St. Rita, IL) | Chicago Catholic League Indoor Championships(IL), 2015-03-21(#3) |
| B-400 | 21 | 53.17 | Ege, Lucas (2015) (Burlington Central, IL) | Byron Indoor Classic(IL), 2015-03-21(#1) |
| B-400 | 22 | 53.22 | Walker, Jonathon (2016) (Glenbard South, IL) | Proviso East Midwest Classic(IL), 2015-03-28(#4) |
| B-400 | 23 | 53.28 | Davis, Jaelen (2016) (De La Salle Institute, IL) | Chicago Catholic League Indoor Championships(IL), 2015-03-21(#5) |
| B-400 | 24 | 53.46 | Stine, Connor (2015) (Olympia, IL) | Normal West Boys Invitational(IL), 2015-02-28(#5) |
| B-400 | 25 | 53.48 | Cook, Disaun (2015) (Morton, IL) | WSC-Gold Boys Indoor Conference Meet(IL), 2015-03-20(#5) |
| B-400 | 26 | 53.50 | Riggs, Grant (2015) (Highland, IL) | Jersey Winter Thaw Invitational(IL), 2015-03-14(#2) |
| B-400 | 27 | 53.56 | Strode, Tyler (2015) (Lanphier, IL) | Normal West Boys Invitational(IL), 2015-02-28(#6) |
| B-400 | 27 | 53.56 | Pointer, Colfay (2016) (Rochelle, IL) | NIB-12 Indoor Conference Meet(IL), 2015-03-21(#2) |
| B-400 | 29 | 53.57 | Crim, Corbin (2016) (Harrisburg, IL) | UK HS Invitational(KY), 2015-02-21(#29) |
| B-400 | 30 | 53.58 | Rieke, Jaxon (2015) (Eureka, IL) | Illinois Top Times Championships - Class 1A(IL), 2015-03-27(#5) |
| B-400 | 31 | 53.61 | Hardaway, Nate (Cahokia, IL) | Arkansas HS Invitational(AR), 2015-01-17(#66) |
| B-400 | 32 | 53.71 | Durousseau, Xaviaer (2015) (Pontiac, IL) | Jacksonville Large School Invitational(IL), 2015-03-06(#2) |
| B-400 | 33 | 53.80 | Cornwell, Dylan (2017) (Cahokia, IL) | SIU Boys HS Invitational(IL), 2015-03-07(#6) |
| B-400 | 34 | 53.82 | Eisenmenger, Getch (2016) (Tolono Unity, IL) | Urbana Uni Meet #4(IL), 2015-03-18(#3) |
| B-400 | 35 | 53.87 | Carlisle, Jeremy (2015) (Fenwick, IL) | Chicago Catholic League Indoor Championships(IL), 2015-03-21(#6) |
| B-400 | 36 | 53.89 | Triplett, Nick (2017) (Lindblom College Preparatory, IL) | CPS Indoor Meet - Group B(IL), 2015-03-22(#3) |
| B-400 | 37 | 53.98 | Harris, Demoria (2015) (Dunbar Vocational Academy, IL) | DeLaSalle Presidents Day Classic(IL), 2015-02-15(#1) |
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| | | See more performances for B-400 | | |
