| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-SMR | 1 | 3:38.30 | Boys Relay (Pontiac, IL) | Olympia Co-Ed Invitational(IL), 2012-04-17(#1) |
| B-SMR | 2 | 3:38.60 | Boys Relay (Loyola Academy, IL) | Spartan Relays(IL), 2012-04-27(#1) |
| B-SMR | 3 | 3:40.05 | Boys Relay (Neuqua Valley, IL) | NB Nationals - EE/Frosh(NC), 2012-06-16(#6) |
| B-SMR | 4 | 3:41.00 | Boys Relay (Downers Grove South, IL) | Hinsdale Relays(IL), 2012-04-07(#1) |
| B-SMR | 4 | 3:41.00 | Boys Relay (Deerfield, IL) | Spartan Relays(IL), 2012-04-27(#2) |
| B-SMR | 6 | 3:42.20 | Boys Relay (Maine West, IL) | Prospect Relays(IL), 2012-04-07(#1) |
| B-SMR | 7 | 3:42.90 | Boys Relay (Highland Park, IL) | Spartan Relays(IL), 2012-04-27(#3) |
| B-SMR | 8 | 3:43.40 | Boys Relay (York Community, IL) | Wanner Knights Invitational(IL), 2012-04-27(#1) |
| B-SMR | 9 | 3:43.70 | Boys Relay (Highland, IL) | O'Fallon Relays(IL), 2012-03-30(#1) |
| B-SMR | 10 | 3:44.00 | Boys Relay (Prospect, IL) | Prospect Relays(IL), 2012-04-07(#2) |
| B-SMR | 11 | 3:44.56 | Boys Relay (Morgan Park, IL) | Windy City Relays(IL), 2012-04-21(#1) |
| B-SMR | 12 | 3:45.00 | Boys Relay (Belleville East, IL) | O'Fallon Relays(IL), 2012-03-30(#2) |
| B-SMR | 13 | 3:46.60 | Boys Relay (Oak Park-River Forest, IL) | Hinsdale Relays(IL), 2012-04-07(#2) |
| B-SMR | 14 | 3:46.92 | Boys Relay (Naperville Central, IL) | Wanner Knights Invitational(IL), 2012-04-27(#2) |
| B-SMR | 15 | 3:47.10 | Boys Relay (Lyons Township, IL) | Hinsdale Relays(IL), 2012-04-07(#3) |
| B-SMR | 16 | 3:48.36 | Boys Relay (Collinsville, IL) | SW Illinois Relays(IL), 2012-03-24(#1) |
| B-SMR | 17 | 3:48.53 | Boys Relay (St. Charles North, IL) | Lyons Township Relays(IL), 2012-04-20(#2) |
| B-SMR | 18 | 3:48.70 | Boys Relay (Belleville West, IL) | O'Fallon Relays(IL), 2012-03-30(#3) |
| B-SMR | 19 | 3:49.09 | Boys Relay (Harlem, IL) | Hub Relays(IL), 2012-04-14(#1) |
| B-SMR | 20 | 3:49.20 | Boys Relay (Triad, IL) | O'Fallon Relays(IL), 2012-03-30(#4) |
| B-SMR | 21 | 3:49.60 | Boys Relay (Hinsdale Central, IL) | Lyons Township Relays(IL), 2012-04-20(#3) |
| B-SMR | 22 | 3:49.70 | Boys Relay (Hinsdale South, IL) | Hinsdale Relays(IL), 2012-04-07(#4) |
| B-SMR | 23 | 3:49.80 | Boys Relay (Hononegah, IL) | Hononegah Relays(IL), 2012-04-21(#2) |
| B-SMR | 24 | 3:49.95 | Boys Relay (Niles North, IL) | Wanner Knights Invitational(IL), 2012-04-27(#4) |
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| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| G-SMR | 1 | 4:22.41 | Girls Relay (Belleville West, IL) | Edwardsville Girls Tiger Relays(IL), 2012-04-11(#1) |
| G-SMR | 2 | 4:25.94 | Girls Relay (Centralia, IL) | Edwardsville Girls Tiger Relays(IL), 2012-04-11(#2) |
| G-SMR | 3 | 4:26.37 | Girls Relay (O'Fallon, IL) | Edwardsville Girls Tiger Relays(IL), 2012-04-11(#3) |
| G-SMR | 4 | 4:27.70 | Girls Relay (Wheaton-Warrenville South, IL) | Prospect Girls Relays(IL), 2012-04-05(#1) |
| G-SMR | 5 | 4:31.83 | Girls Relay (Edwardsville, IL) | Edwardsville Girls Tiger Relays(IL), 2012-04-11(#4) |
| G-SMR | 6 | 4:34.00 | Girls Relay (Wheeling, IL) | Prospect Girls Relays(IL), 2012-04-05(#2) |
| G-SMR | 7 | 4:35.08 | Girls Relay (Benton, IL) | Edwardsville Girls Tiger Relays(IL), 2012-04-11(#5) |
| G-SMR | 8 | 4:35.53 | Girls Relay (East St. Louis-Senior, IL) | Windy City Relays(IL), 2012-04-21(#1) |
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