| Event | Rank | Mark | By | Meet |
| B-600 | 1 | 1:22.38 | Mazanke, Jake (2012) (St. Charles East, IL) (US#27) | York Boys Invitational(IL), 2012-03-02(#1) |
| B-600 | 2 | 1:24.20 | Bender, Jacob (2012) (Neuqua Valley, IL) (US#88) | Morton Boys Triangular(IL), 2012-02-10(#1) |
| B-600 | 3 | 1:24.60 | Fisher, Evan (2012) (Oak Park-River Forest, IL) | WSC-Silver Boys Indoor(IL), 2012-03-16(#1) |
| B-600 | 4 | 1:24.93 | Weaver, James (2012) (Conant, IL) | York Boys Invitational(IL), 2012-03-02(#2) |
| | | National Elites above. State Elites below | | |
| B-600 | 5 | 1:25.16 | Vonmallinckrodt, Max (2012) (Hinsdale Central, IL) | WSC-Silver Boys Indoor(IL), 2012-03-16(#2) |
| B-600 | 6 | 1:25.90 | Villa, Roman (2013) (J Sterling Morton, IL) | Argo Boys Invitational(IL), 2012-03-10(#1) |
| B-600 | 7 | 1:25.93 | Glaubke, Eric (2012) (York Community, IL) | York Boys Invitational(IL), 2012-03-02(#3) |
| B-600 | 8 | 1:26.20 | Cornelius, Kendric (2012) (Palatine, IL) | Proviso W Boys Open(IL), 2012-03-09(#1) |
| B-600 | 9 | 1:26.50 | Clingerman, Andrew (2013) (Palatine, IL) | Proviso W Boys Open(IL), 2012-03-09(#2) |
| B-600 | 10 | 1:26.60 | Omar, Neal (2012) (Niles West, IL) | Niles West City Meet #2(IL), 2012-02-17(#1) |
| B-600 | 11 | 1:26.97 | Campos, Josh (2012) (Prospect, IL) | Proviso East MW Classic(IL), 2012-03-24(#1) |
| B-600 | 12 | 1:27.00 | Dost, Mike (2012) (Lyons Township, IL) | Proviso W Boys Open(IL), 2012-03-09(#3) |
| B-600 | 13 | 1:27.22 | Keller, Kendall (Homewood-Flossmoor, IL) | Proviso East MW Classic(IL), 2012-03-24(#2) |
| B-600 | 14 | 1:27.40 | Helton, Blake (2012) (Niles West, IL) | Niles West City Meet #2(IL), 2012-02-17(#2) |
| B-600 | 15 | 1:27.79 | Kouchoukos, Brad (2012) (Naperville Central, IL) | Proviso West Invitational(IL), 2012-02-25(#2) |
| B-600 | 16 | 1:27.82 | Garcia, Julius (2013) (Neuqua Valley, IL) | Proviso West Invitational(IL), 2012-02-25(#3) |
| B-600 | 17 | 1:27.95 | Amiri, Jacob (2014) (Downers Grove South, IL) | WSC-Gold Boys Indoor(IL), 2012-03-17(#2) |
| B-600 | 18 | 1:28.00 | Wajda, Greg (Naperville North, IL) | York Boys Invitational(IL), 2012-03-02(#4) |
| B-600 | 19 | 1:28.10 | Khoury, Chris (2012) (York Community, IL) | York Boys Triangular(IL), 2012-02-22(#1) |
| B-600 | 20 | 1:28.14 | Oury, Sam (2012) (Downers Grove South, IL) | Proviso West Invitational(IL), 2012-02-25(#4) |
| B-600 | 21 | 1:28.15 | Lima, Alex (2015) (Lyons Township, IL) | WSC-Silver Boys Indoor(IL), 2012-03-16(#4) |
| B-600 | 22 | 1:28.26 | Zea, Tony (2014) (Downers Grove North, IL) | WSC-Silver Boys Indoor(IL), 2012-03-16(#5) |
| B-600 | 23 | 1:28.39 | Zemel, Ryan (2013) (Downers Grove North, IL) | Proviso West Invitational(IL), 2012-02-25(#5) |
| B-600 | 24 | 1:28.47 | Johnson, Elliott (Minooka Community, IL) | York Boys Invitational(IL), 2012-03-02(#5) |
| B-600 | 25 | 1:28.51 | Askew, Jwauhn (2014) (East St. Louis-Senior, IL) | Proviso East MW Classic(IL), 2012-03-24(#3) |
| B-600 | 26 | 1:28.65 | Wilson, Chris (2014) (Minooka Community, IL) | York Boys Invitational(IL), 2012-03-02(#6) |
| B-600 | 27 | 1:28.67 | Howell, Tim (2013) (Oak Park-River Forest, IL) | WSC-Silver Boys Indoor(IL), 2012-03-16(#7) |
| B-600 | 28 | 1:28.73 | Mroz, Nathan (2014) (York Community, IL) | York Boys Invitational(IL), 2012-03-02(#7) |
| B-600 | 29 | 1:28.84 | Jorgensen, Kevin (2012) (Lake Park, IL) | Proviso West Invitational(IL), 2012-02-25(#6) |
| B-600 | 30 | 1:29.29 | Degelmann, Ryan (Buffalo Grove, IL) | Proviso East MW Classic(IL), 2012-03-24(#4) |
| B-600 | 31 | 1:29.50 | Rangel, Luis (2012) (Niles North, IL) | Argo Boys Invitational(IL), 2012-03-10(#2) |
| B-600 | 32 | 1:29.82 | Kielbania, David (Addison Trail, IL) | WSC-Gold Boys Indoor(IL), 2012-03-17(#3) |
| B-600 | 33 | 1:30.00 | Parks, Matt (2013) (York Community, IL) | Proviso W Quintangular #2(IL), 2012-02-10(#1) |
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