| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-SMR | 1 | 3:37.10 | Boys Relay (Plainfield Central, IL) | Hinsdale Relays(IL), 2015-04-11(#1) |
| B-SMR | 2 | 3:37.60 | Boys Relay (Deerfield, IL) | Glenbrook North Spartan Relays(IL), 2015-05-01(#1) |
| B-SMR | 3 | 3:37.92 | Boys Relay (O'Fallon, IL) | Southwestern Illinois Relays(IL), 2015-03-28(#1) |
| B-SMR | 4 | 3:38.60 | Boys Relay (Hinsdale South, IL) | Hinsdale Relays(IL), 2015-04-11(#2) |
| B-SMR | 5 | 3:38.80 | Boys Relay (Lyons Township, IL) | Hinsdale Relays(IL), 2015-04-11(#3) |
| B-SMR | 6 | 3:39.70 | Boys Relay (Taft, IL) | Hinsdale Relays(IL), 2015-04-11(#4) |
| B-SMR | 7 | 3:40.00 | Boys Relay (East St. Louis-Senior, IL) | Alton F/S Boys Relays(IL), 2015-04-14(#1) |
| B-SMR | 8 | 3:40.43 | Boys Relay (Granite City, IL) | Marion Relays(IL), 2015-05-01(#1) |
| B-SMR | 9 | 3:40.53 | Boys Relay (Hononegah, IL) | Wanner Knights Invitational(IL), 2015-05-01(#1) |
| B-SMR | 10 | 3:42.26 | Boys Relay (Prospect, IL) | Wanner Knights Invitational(IL), 2015-05-01(#2) |
| B-SMR | 11 | 3:42.30 | Boys Relay (Lake Forest, IL) | Glenbrook North Spartan Relays(IL), 2015-05-01(#2) |
| B-SMR | 12 | 3:42.32 | Boys Relay (Maine East, IL) | Prospect Boys Relays(IL), 2015-04-11(#1) |
| B-SMR | 13 | 3:42.89 | Boys Relay (Zion-Benton Twnshp, IL) | Lyons Township Boys Relays(IL), 2015-04-24(#1) |
| B-SMR | 14 | 3:43.13 | Boys Relay (York Community, IL) | Wanner Knights Invitational(IL), 2015-05-01(#3) |
| B-SMR | 15 | 3:43.40 | Boys Relay (Barrington, IL) | Palatine Relays(IL), 2015-05-02(#1) |
| B-SMR | 16 | 3:43.58 | Boys Relay (Naperville Central, IL) | Wanner Knights Invitational(IL), 2015-05-01(#4) |
| B-SMR | 17 | 3:43.92 | Boys Relay (Downers Grove South, IL) | Wanner Knights Invitational(IL), 2015-05-01(#5) |
| B-SMR | 18 | 3:43.93 | Boys Relay (Belleville East, IL) | Southwestern Illinois Relays(IL), 2015-03-28(#2) |
| B-SMR | 19 | 3:45.21 | Boys Relay (Palatine, IL) | Palatine Relays(IL), 2015-05-02(#2) |
| B-SMR | 20 | 3:45.30 | Boys Relay (Oak Park-River Forest, IL) | Hinsdale Relays(IL), 2015-04-11(#5) |
| B-SMR | 21 | 3:45.70 | Boys Relay (J Sterling Morton, IL) | Hinsdale Relays(IL), 2015-04-11(#6) |
| B-SMR | 22 | 3:45.96 | Boys Relay (Lakes, IL) | Wanner Knights Invitational(IL), 2015-05-01(#6) |
| B-SMR | 23 | 3:46.10 | Boys Relay (Waukegan , IL) | Glenbrook North Spartan Relays(IL), 2015-05-01(#3) |
| B-SMR | 24 | 3:46.32 | Boys Relay (Niles North, IL) | Wanner Knights Invitational(IL), 2015-05-01(#7) |
| B-SMR | 25 | 3:46.80 | Boys Relay (Lake Zurich, IL) | Glenbrook North Spartan Relays(IL), 2015-05-01(#4) |
| B-SMR | 26 | 3:47.05 | Boys Relay (Prairie Ridge, IL) | Palatine Relays(IL), 2015-05-02(#3) |
| B-SMR | 27 | 3:49.03 | Boys Relay (Moline, IL) | Gene Shipley Invitational(IL), 2015-04-04(#1) |
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| | | See more performances for B-SMR | | |
| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| G-SMR | 1 | 4:15.60 | Girls Relay (Barrington, IL) | Palatine Relays(IL), 2015-05-02(#1) |
| G-SMR | 2 | 4:21.69 | Girls Relay (Evanston Township, IL) | Eastern Relays(KY), 2015-04-25(#5) |
| G-SMR | 3 | 4:24.27 | Girls Relay (East St. Louis-Senior, IL) | Jackie Joyner Kersee Relays(IL), 2015-04-04(#1) |
| G-SMR | 4 | 4:24.50 | Girls Relay (Palatine, IL) | Palatine Relays(IL), 2015-05-02(#2) |
| G-SMR | 5 | 4:27.08 | Girls Relay (Minooka Community, IL) | Prospect Girls Relays(IL), 2015-04-10(#1) |
| G-SMR | 6 | 4:28.40 | Girls Relay (O'Fallon, IL) | Edwardsville Girls Tiger Relays(IL), 2015-04-15(#1) |
| G-SMR | 7 | 4:29.41 | Girls Relay (Rock Island, IL) | Gene Shipley Invitational(IL), 2015-04-04(#1) |
| G-SMR | 8 | 4:31.26 | Girls Relay (Libertyville, IL) | Al Janulis Relays(IL), 2015-04-18(#2) |
| G-SMR | 9 | 4:31.59 | Girls Relay (Wheaton-Warrenville South, IL) | Prospect Girls Relays(IL), 2015-04-10(#2) |
| G-SMR | 10 | 4:32.08 | Girls Relay (Mundelein Cons, IL) | Palatine Relays(IL), 2015-05-02(#3) |
| G-SMR | 11 | 4:33.95 | Girls Relay (Fremd, IL) | Palatine Relays(IL), 2015-05-02(#4) |
| G-SMR | 12 | 4:37.45 | Girls Relay (Simeon Career Academy, IL) | Jackie Joyner Kersee Relays(IL), 2015-04-04(#5) |
| G-SMR | 13 | 4:38.38 | Girls Relay (Warren Township, IL) | Prospect Girls Relays(IL), 2015-04-10(#3) |
| G-SMR | 14 | 4:39.55 | Girls Relay (Edwardsville, IL) | Edwardsville Girls Tiger Relays(IL), 2015-04-15(#3) |
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| | | See more performances for G-SMR | | |
