| Event | Rank | Mark | By | Meet |
| B-600 | 1 | 1:23.93 | Lillard, Dan (2016) (Hinsdale Central, IL) (US#79) | WSC-Silver Boys Indoor Conference Meet(IL), 2015-03-21(#2) |
| | | National Elites above. State Elites below | | |
| B-600 | 2 | 1:25.59 | Jordan, Brian (2016) (Hinsdale South, IL) | WSC-Gold Boys Indoor Conference Meet(IL), 2015-03-20(#1) |
| B-600 | 3 | 1:26.55 | Wolz, Justin (2016) (Minooka Community, IL) | Homewood-Flossmoor Boys Quad #2(IL), 2015-02-21(#1) |
| B-600 | 4 | 1:26.99 | Johnson, Kimathi (2016) (Oak Park-River Forest, IL) | WSC-Silver Boys Indoor Conference Meet(IL), 2015-03-21(#1) |
| B-600 | 5 | 1:27.04 | Prescott, Robert (2016) (Downers Grove North, IL) | WSC-Silver Boys Indoor Conference Meet(IL), 2015-03-21(#2) |
| B-600 | 6 | 1:27.21 | Gamboa, Bryan (2016) (Hoffman Estates, IL) | York Boys Invitational(IL), 2015-03-06(#5) |
| B-600 | 7 | 1:27.42 | Staples, Alex (2016) (Oak Park-River Forest, IL) | WSC-Silver Boys Indoor Conference Meet(IL), 2015-03-21(#3) |
| B-600 | 8 | 1:27.80 | Filipic, Luke (2016) (Prospect, IL) | York Boys Invitational(IL), 2015-03-06(#7) |
| B-600 | 9 | 1:27.99 | Raymond, Chris (2016) (Cahokia, IL) | Proviso West Boys Invitational(IL), 2015-02-28(#4) |
| B-600 | 10 | 1:28.09 | Eckhardt, Teddy (2016) (Prospect, IL) | Proviso West Boys Invitational(IL), 2015-02-28(#6) |
| B-600 | 11 | 1:28.56 | Christie, Ryan (2016) (Evanston Township, IL) | Lockport Boys Open(IL), 2015-02-28(#1) |
| B-600 | 12 | 1:29.14 | Neumann, Eric (2016) (Glenbard West, IL) | WSC-Silver Boys Indoor Conference Meet(IL), 2015-03-21(#7) |
| B-600 | 13 | 1:29.57 | King, Michael (2016) (Glenbard South, IL) | York Boys Invitational(IL), 2015-03-06(#10) |
| B-600 | 14 | 1:29.67 | Abram, Daniel (2016) (Lockport Township , IL) | Lockport Boys Open(IL), 2015-02-28(#3) |
| B-600 | 15 | 1:29.77 | Tomaska, Robert (2016) (York Community, IL) | Proviso West Boys Invitational(IL), 2015-02-28(#9) |
| B-600 | 16 | 1:29.96 | Sciurba, Mark (2016) (St. Charles East, IL) | York Boys Invitational(IL), 2015-03-06(#11) |
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| | | See more performances for B-600 | | |
