| Event | Rank | Mark | By | Meet |
| B-300H | 1 | 37.10 | Ege, Lucas (2015) (Burlington Central, IL) (US#20) | IL 2A Boys State Finals(IL), 2015-05-30(#1) |
| B-300H | 2 | 37.43 | Mcshane, Deion (2018) (Freeport, IL) (US#37) | IL 2A Boys State Finals(IL), 2015-05-30(#2) |
| B-300H | 3 | 37.98 | Ruffin, Brandon (2015) (Peoria, IL) | IL 2A Boys State Finals(IL), 2015-05-30(#3) |
| B-300H | 4 | 38.04 | Session, Korrion (2015) (Cahokia, IL) | IL 2A Boys State Finals(IL), 2015-05-30(#4) |
| | | National Elites above. State Elites below | | |
| B-300H | 5 | 38.53 | Vanderheyden, Reed (2018) (Geneseo, IL) | IL 2A Boys State Finals(IL), 2015-05-30(#5) |
| B-300H | 6 | 38.75 | Gyuricza, Zach (2015) (Saint Viator, IL) | IL 2A Boys State Finals(IL), 2015-05-30(#6) |
| B-300H | 7 | 39.13 | Pranka, Drew (2015) (Princeton, IL) | IL 2A Boys State Finals(IL), 2015-05-30(#7) |
| B-300H | 8 | 39.29 | Luesse, Aaron (2015) (Tolono Unity, IL) | IL 1A Boys State Finals(IL), 2015-05-30(#2) |
| B-300H | 9 | 39.64 | Wells, Keondre (2017) (Cahokia, IL) | Marion Freeman Invitational(MO), 2015-05-02(#4) |
| B-300H | 10 | 39.74 | Garcia, Edgar (2015) (Sycamore, IL) | IL 2A Sterling Boys Sectional(IL), 2015-05-22(#3) |
| B-300H | 11 | 39.91 | Cable, Aaron (2015) (Rochester, IL) | Central State Eight Boys Conference Meet(IL), 2015-05-15(#2) |
| B-300H | 12 | 39.94 | Durousseau, Xaviaer (2015) (Pontiac, IL) | Mahomet-Seymour Boys Invitational(IL), 2015-05-16(#1) |
| B-300H | 13 | 39.96 | Mead, Lenny (2016) (Princeton, IL) | Mendota Co-Ed Invitational(IL), 2015-05-01(#1) |
| B-300H | 13 | 39.96 | Kokos, Bailey (2015) (Dunlap, IL) | IL 2A Macomb Boys Sectional(IL), 2015-05-21(#2) |
| B-300H | 15 | 39.98 | Woods, Darrell (2016) (Herrin, IL) | IL 2A Triad Boys Sectional(IL), 2015-05-21(#2) |
| B-300H | 16 | 40.01 | Arzu, Darien (2015) (Hillcrest, IL) | IL 2A Hillcrest Boys Sectional(IL), 2015-05-22(#1) |
| B-300H | 17 | 40.02 | King, Stephon (2017) (Manual, IL) | IL 2A Macomb Boys Sectional(IL), 2015-05-21(#3) |
| B-300H | 18 | 40.08 | King, Steffon (2017) (Manual, IL) | Pekin Dragon Invitational(IL), 2015-05-01(#2) |
| B-300H | 19 | 40.12 | Downing, Denzel (2016) (Saint Viator, IL) | IL 2A Richmond-Burton Boys Sectional(IL), 2015-05-22(#2) |
| B-300H | 20 | 40.14 | Deming, Cole (2015) (Hillsboro, IL) | IL 2A Lanphier Boys Sectional(IL), 2015-05-22(#1) |
| B-300H | 20 | 40.14 | Pederson, Andy (Hampshire, IL) | IL 2A Richmond-Burton Boys Sectional(IL), 2015-05-22(#3) |
| B-300H | 22 | 40.32 | Walters, Eric (2015) (LaSalle-Peru, IL) | Mendota Co-Ed Invitational(IL), 2015-05-01(#2) |
| B-300H | 23 | 40.39 | Hernandez, Alex (2015) (Belvidere, IL) | IL 2A Sterling Boys Sectional(IL), 2015-05-22(#4) |
| B-300H | 24 | 40.40 | Hayles, Gamar (2016) (Rich Central, IL) | IL 2A Hillcrest Boys Sectional(IL), 2015-05-22(#2) |
| B-300H | 25 | 40.41 | Robertson, Tanner (2016) (Kaneland , IL) | IL 2A Sterling Boys Sectional(IL), 2015-05-22(#5) |
| B-300H | 26 | 40.44 | Rawls, Treyonne (2016) (Thornridge, IL) | IL 2A Hillcrest Boys Sectional(IL), 2015-05-22(#3) |
| B-300H | 27 | 40.52 | Mathews, Luke (2015) (Mascoutah, IL) | Belleville West Boys Invitational(IL), 2015-04-11(#7) |
| B-300H | 28 | 40.63 | Douglas, Quinton (2015) (Dixon, IL) | IL 2A Sterling Boys Sectional(IL), 2015-05-22(#6) |
| B-300H | 29 | 40.76 | Litwiller, Levi (2016) (Olympia, IL) | IL 2A Boys State Prelims(IL), 2015-05-29(#13) |
| B-300H | 30 | 40.92 | Rightnowar, Cody (2016) (Harrisburg, IL) | IL 2A Triad Boys Sectional(IL), 2015-05-21(#5) |
| B-300H | 31 | 40.96 | Schraufnagel, Logan (2015) (Freeburg Community, IL) | Cahokia Conference Championships(IL), 2015-05-06(#1) |
| B-300H | 32 | 41.00 | Becker, Clayton (2015) (Monticello, IL) | Monticello Boys Invitational(IL), 2015-04-17(#2) |
| B-300H | 33 | 41.05 | Bray, Mason (2017) (Normal University, IL) | IL 2A Macomb Boys Sectional(IL), 2015-05-21(#4) |
| B-300H | 34 | 41.17 | Walker, Eric (2015) (St. Rita, IL) | Chicago Catholic League Championships(IL), 2015-05-16(#1) |
| B-300H | 35 | 41.19 | Bleyer, Joseph (2015) (Fenwick, IL) | Chicago Catholic League Championships(IL), 2015-05-16(#2) |
| B-300H | 36 | 41.21 | Musabji, Yash (2016) (Belvidere, IL) | IL 2A Sterling Boys Sectional(IL), 2015-05-22(#7) |
| B-300H | 37 | 41.26 | Hecht, Colin (2016) (Effingham, IL) | Belleville West Boys Invitational(IL), 2015-04-11(#11) |
| B-300H | 38 | 41.30 | Lewis, Don (2015) (Evergreen Park, IL) | South Suburban Red Boys Conference Meet(IL), 2015-05-14(#1) |
| B-300H | 38 | 41.30 | Nickerson, Clayton (2016) (Triad, IL) | Mississippi Valley Boys Conference Meet(IL), 2015-05-13(#2) |
| B-300H | 40 | 41.32 | Thayer, Alex (Pecatonica, IL) | IL 1A Byron Boys Sectional(IL), 2015-05-22(#4) |
| B-300H | 41 | 41.39 | Watkins, Tanner (2015) (Sycamore, IL) | Gib Seegers Invitational(IL), 2015-05-01(#3) |
| B-300H | 42 | 41.40 | Galarza, Daniel (2015) (Harvard, IL) | Big Northern East Boys Conference Meet(IL), 2015-05-14(#2) |
| B-300H | 42 | 41.40 | Pederson, Andrew (2015) (Hampshire, IL) | Northern Illinois Invitational(IL), 2015-05-08(#5) |
| B-300H | 44 | 41.41 | Mccormick, Tyler (2016) (Carbondale Comm, IL) | IL 2A Triad Boys Sectional(IL), 2015-05-21(#6) |
| B-300H | 45 | 41.42 | Brunoehler, Jesse (Sandwich Community, IL) | IL 2A LaSalle-Peru Boys Sectional(IL), 2015-05-22(#5) |
| B-300H | 46 | 41.43 | Beauchem, Isaac (2017) (Carterville, IL) | IL 2A Triad Boys Sectional(IL), 2015-05-21(#7) |
| B-300H | 47 | 41.45 | Binion, Dylan (2016) (Erie-Prophetstown, IL) | Gebhardt-Worley Invitational(IL), 2015-04-11(#1) |
| B-300H | 48 | 41.46 | Otterbach, Bryce (2016) (Mendota, IL) | Big Northern West Boys Conference Meet(IL), 2015-05-14(#1) |
| B-300H | 49 | 41.54 | Anghel, Bogdan (2015) (Antioch, IL) | North Suburban Boys Conference Meet(IL), 2015-05-14(#6) |
| B-300H | 49 | 41.54 | Mudd, Mark (2016) (Mt. Carmel, IL) | IL 2A Boys State Prelims(IL), 2015-05-29(#18) |
| B-300H | 51 | 41.57 | Dresbach, Luke (2015) (LaSalle-Peru, IL) | John McCormick Invitational(IL), 2015-05-08(#2) |
| B-300H | 52 | 41.64 | Siebert, Gus (2015) (Woodstock, IL) | Fox Valley Boys Conference meet(IL), 2015-05-15(#4) |
| B-300H | 53 | 41.68 | Cosgrove, Ben (2017) (Geneseo, IL) | Galesburg Boys ABC Invitational(IL), 2015-04-17(#2) |
| B-300H | 54 | 41.72 | Marler, Tyler (2016) (Harrisburg, IL) | Murphysboro Boys Invitational(IL), 2015-04-18(#1) |
| B-300H | 55 | 41.74 | Pitchford, Malcolm (2015) (Montini Catholic, IL) | Mike Yavorski Hornet Invitational(IL), 2015-05-01(#2) |
| B-300H | 55 | 41.74 | Harrison, Jared (2018) (Dixon, IL) | IL 2A Sterling Boys Sectional(IL), 2015-05-22(#8) |
| B-300H | 57 | 41.85 | Ekberg, Jared (Rockford Christian, IL) | IL 2A Sterling Boys Sectional(IL), 2015-05-22(#9) |
| B-300H | 58 | 42.00 | Pennel, Dillion (2015) (Jacksonville, IL) | Central State Eight Boys Conference Meet(IL), 2015-05-15(#3) |
| B-300H | 58 | 42.00 | Harris, Tracker (2017) (Dunlap, IL) | Dunlap Co-Ed Relays(IL), 2015-01-01(#2) |
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