| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 48.36 | Watson, Jeremiah (2014) (Urban Prep Englewood, IL) | IL 2A Boys State Finals(IL), 2014-05-31(#1) |
| B-400 | 2 | 48.43 | Clark, Devante (2014) (Jacksonville, IL) | IL 2A Boys State Finals(IL), 2014-05-31(#2) |
| B-400 | 3 | 48.58 | Harris, Aaron (2016) (Lisle, IL) | AAU National Junior Olympics 17-18(IA), 2014-08-02(#6) |
| B-400 | 4 | 49.03 | LaFayette, J.D. (2014) (Normal University, IL) | Bloomington / Normal Inter City Meet(IL), 2014-04-29(#1) |
| B-400 | 4 | 49.03 | Landry, Tayvonne (2014) (Carbondale Comm, IL) | IL 2A Herrin Boys Sectional(IL), 2014-05-22(#1) |
| B-400 | 6 | 49.10 | Kucera, Nathaniel (2014) (Kaneland , IL) | IL 2A Boys State Prelims(IL), 2014-05-30(#4) |
| B-400 | 7 | 49.34 | Riley, Brandon (2014) (Morgan Park, IL) | Chicago Public League Championships(IL), 2014-05-10(#1) |
| B-400 | 8 | 49.46 | Carter, Kyle (2014) (Kaneland , IL) | IL 2A Boys State Prelims(IL), 2014-05-30(#6) |
| B-400 | 9 | 49.52 | Ruff, Matt (2014) (Wheaton Academy, IL) | IL 2A Boys State Prelims(IL), 2014-05-30(#7) |
| B-400 | 9 | 49.52 | Monigan, Jalon (2014) (Cahokia, IL) | Great Southwest Classic(NM), 2014-06-07(#16) |
| B-400 | 11 | 49.58 | Lyons, Tyran (2016) (Cahokia, IL) | St. Clair County Boys Championships(IL), 2014-04-29(#2) |
| B-400 | 11 | 49.58 | Moore, Will (2015) (Metamora, IL) | AAU Region 13 Qualifier(IL), 2014-06-29(#6) |
| B-400 | 13 | 49.94 | Brady, Marlin (2014) (Cahokia, IL) | IL 2A Herrin Boys Sectional(IL), 2014-05-22(#3) |
| B-400 | 14 | 50.02 | Crim, Corbin (2016) (Harrisburg, IL) | Murphysboro Boys Invitational(IL), 2014-04-19(#2) |
| B-400 | 15 | 50.34 | Shadid, David (2015) (Notre Dame, IL) | PJS Honor Roll Meet(IL), 2014-05-27(#1) |
| B-400 | 16 | 50.37 | McGee, Terry (2014) (North Lawndale Charter, IL) | IL 3A St. Ignatius Boys Sectional(IL), 2014-05-22(#1) |
| B-400 | 17 | 50.45 | Charlton, Brett (2015) (Eureka, IL) | Eureka Co-Ed Open #2(IL), 2014-04-21(#1) |
| B-400 | 18 | 50.47 | Blankenship, Sam (2015) (Johnsburg, IL) | IL 2A Grayslake Central Sectional(IL), 2014-05-23(#1) |
| B-400 | 19 | 50.56 | Bunch, Troy (2014) (Springfield Southeast, IL) | Springfield Boys City Meet(IL), 2014-05-06(#1) |
| B-400 | 20 | 50.70 | Riggs, Grant (2015) (Highland, IL) | Mascoutah Boys Invitational(IL), 2014-04-25(#1) |
| B-400 | 21 | 50.78 | Redman, Jerome (2015) (Dusable, IL) | IL 2A Boys State Prelims(IL), 2014-05-30(#13) |
| B-400 | 22 | 50.79 | Hohlfelder, Sam (2014) (Mahomet-Seymour, IL) | Corn Belt Conference Meet(IL), 2014-05-09(#1) |
| B-400 | 23 | 50.82 | Frejowski, Tom (2015) (Northside Prep, IL) | IL 3A Boys State Prelims(IL), 2014-05-30(#23) |
| B-400 | 24 | 50.90 | Porter, Aaron (2017) (Marion, IL) | IL 2A Herrin Boys Sectional(IL), 2014-05-22(#4) |
| B-400 | 25 | 50.95 | Vernon, Wyatt (2014) (Prairie Central, IL) | IL 2A Mendota Boys Sectional(IL), 2014-05-23(#1) |
| B-400 | 26 | 51.05 | Burton, Josh (2014) (Monticello, IL) | IL 2A Centennial Boys Sectional(IL), 2014-05-23(#1) |
| B-400 | 27 | 51.06 | Oladejo, Tobi (2014) (Evergreen Park, IL) | IL 2A Boys State Prelims(IL), 2014-05-30(#15) |
| B-400 | 27 | 51.06 | Haynes, Joshua (2015) (Marian Catholic, IL) | IL 2A Thornridge Boys Sectional(IL), 2014-05-22(#3) |
| B-400 | 29 | 51.10 | Wheatley, Monterious (2015) (Springfield Southeast, IL) | Springfield Boys City Meet(IL), 2014-05-06(#3) |
| B-400 | 30 | 51.17 | Theel, Tyler (2016) (Wauconda Comm, IL) | IL 2A Grayslake Central Sectional(IL), 2014-05-23(#2) |
| B-400 | 31 | 51.18 | Vroegh, Kevin (2014) (Illiana Christian, IL) | Chicago Christian Invitational(IL), 2014-05-02(#2) |
| B-400 | 32 | 51.21 | McManis, Davion (2014) (Dunlap, IL) | Mid Illini Boys Conference Meet(IL), 2014-05-13(#3) |
| B-400 | 33 | 51.28 | Lamendola, Alexander (2014) (Dixon, IL) | York Boys Invitational(IL), 2014-04-25(#1) |
| B-400 | 34 | 51.32 | Kramer, Christian (2015) (Harvard, IL) | IL 2A Grayslake Central Sectional(IL), 2014-05-23(#3) |
| B-400 | 35 | 51.37 | Penalfor, Draque (2014) (Sterling, IL) | IL 2A Burlington Central Boys Sectional(IL), 2014-05-23(#3) |
| B-400 | 35 | 51.37 | Stine, Connor (2015) (Olympia, IL) | Corn Belt Conference Meet(IL), 2014-05-09(#2) |
| B-400 | 37 | 51.43 | Hollingshed, Michael (2015) (Montini Catholic, IL) | IL 2A Glenbard South Boys Sectional(IL), 2014-05-23(#3) |
| B-400 | 38 | 51.44 | Mcgee, Chris (2016) (Cahokia, IL) | Winston Brown Invitational(IL), 2014-04-26(#5) |
| B-400 | 38 | 51.44 | Randa, Kody (2015) (Sandwich Community, IL) | Interstate 8 Conference Meet(IL), 2014-05-08(#3) |
| B-400 | 40 | 51.45 | Ervin, Sharod (2014) (Richwoods, IL) | IL 2A Dunlap Boys Sectional(IL), 2014-05-22(#3) |
| B-400 | 41 | 51.50 | Hilling, Dan (2015) (Triad, IL) | Collinsville Invitational(IL), 2014-05-10(#6) |
| B-400 | 42 | 51.55 | Johnson, Tyler (2015) (St. Rita, IL) | IL 3A St. Rita Boys Sectional(IL), 2014-05-23(#5) |
| B-400 | 43 | 51.56 | Rogers, James (2015) (Monmouth-Roseville, IL) | Galesburg Boys ABC Invitational(IL), 2014-04-19(#1) |
| B-400 | 44 | 51.58 | Culter, Alex (2017) (Mt. Zion, IL) | IL 2A Centennial Boys Sectional(IL), 2014-05-23(#3) |
| B-400 | 45 | 51.59 | Schwaegel, Cole (2015) (Freeburg Community, IL) | Mascoutah Boys Invitational(IL), 2014-04-25(#2) |
| B-400 | 46 | 51.61 | Matthews, Casey (2014) (Burlington Central, IL) | Mike Van Deever Invitational(IL), 2014-04-19(#1) |
| B-400 | 47 | 51.64 | Marshall, Michael (2015) (Plano, IL) | Interstate 8 Conference Meet(IL), 2014-05-08(#4) |
| B-400 | 47 | 51.64 | Tomaszewski, Kai (2016) (Princeton, IL) | IL 2A Mendota Boys Sectional(IL), 2014-05-23(#2) |
| B-400 | 49 | 51.66 | Justus, Zac (2014) (Pontiac, IL) | Dunlap Open(IL), 2014-04-05(#2) |
| B-400 | 50 | 51.75 | Boone, Preston (2014) (Harrisburg, IL) | Buzz Bradley Invitational(IL), 2014-04-25(#1) |
| B-400 | 50 | 51.75 | Bolfing, Austin (2015) (Taylorville, IL) | Glenwood Titan Co-Ed Invitational(IL), 2014-04-25(#1) |
| B-400 | 52 | 51.77 | Miller, Dillon (2015) (Jacksonville, IL) | Glenwood Titan Co-Ed Invitational(IL), 2014-04-25(#2) |
| B-400 | 53 | 51.79 | Swinford, Breck (2014) (Morton, IL) | Mid Illini Boys Conference Meet(IL), 2014-05-13(#4) |
| B-400 | 54 | 51.81 | White, Evan (2014) (Rochelle, IL) | Ogle County Championships(IL), 2014-05-06(#1) |
| B-400 | 54 | 51.81 | Bluhm, Jon (2014) (Sacred Heart-Griffin, IL) | Springfield Boys City Meet(IL), 2014-05-06(#5) |
| B-400 | 56 | 51.86 | Jansen, Tim (2014) (Hampshire, IL) | IL 2A Grayslake Central Sectional(IL), 2014-05-23(#4) |
| B-400 | 57 | 51.89 | McShan, Daniel (2017) (Springfield Southeast, IL) | Gene Ward Invitational(IL), 2014-05-02(#3) |
| B-400 | 58 | 51.90 | Worby, Bryan (2015) (Pontiac, IL) | Metamora Co-Ed Invitational(IL), 2014-04-12(#3) |
| B-400 | 59 | 51.96 | Slovak, Eric (2015) (Vernon Hills, IL) | IL 2A Grayslake Central Sectional(IL), 2014-05-23(#5) |
| B-400 | 60 | 52.01 | Brown, Wes (2014) (Plano, IL) | Interstate 8 Conference Meet(IL), 2014-05-08(#5) |
| B-400 | 61 | 52.04 | Handel, Alex (2014) (Sycamore, IL) | Gib Seegers Classic(IL), 2014-05-02(#3) |
| B-400 | 62 | 52.05 | Victoria, Michael (2015) (Harrisburg, IL) | Buzz Bradley Invitational(IL), 2014-04-25(#2) |
| B-400 | 63 | 52.09 | Monigan, Michael (2014) (Cahokia, IL) | Granite City Invitational(IL), 2014-04-18(#6) |
| B-400 | 64 | 52.10 | Allen, Tyree (2015) (Hillcrest, IL) | Bill Jackson Invitational(IL), 2014-05-09(#6) |
| B-400 | 65 | 52.11 | Johnson, Zakkori (2014) (Champaign Central, IL) | Urbana Boys Open(IL), 2014-04-19(#4) |
| B-400 | 66 | 52.15 | Lesak, Andrew (2015) (Kaneland , IL) | Kane County Championships(IL), 2014-05-09(#6) |
| B-400 | 67 | 52.16 | Peters, Brian (2015) (Saint Viator, IL) | Palatine Relays(IL), 2014-05-03(#7) |
| B-400 | 68 | 52.18 | Napiorkowski, Ian (2014) (Burlington Central, IL) | IL 2A Burlington Central Boys Sectional(IL), 2014-05-23(#4) |
| B-400 | 68 | 52.18 | Zeman, Logan (2014) (LaSalle-Peru, IL) | Lanphier Invitational(IL), 2014-04-26(#4) |
| B-400 | 70 | 52.23 | West, Trajuan (Thornridge, IL) | IL 2A Thornridge Boys Sectional(IL), 2014-05-22(#4) |
| B-400 | 71 | 52.25 | Jones, Amani (2016) (Phillips Academy, IL) | IL 2A Phillips Boys Sectional(IL), 2014-05-23(#3) |
| B-400 | 71 | 52.25 | Sherman, Drew (2015) (Centralia, IL) | IL 2A Herrin Boys Sectional(IL), 2014-05-22(#6) |
| B-400 | 73 | 52.31 | Thompson, Dvaree (2015) (Erie-Prophetstown, IL) | Three Rivers Boys Conf Meet(IL), 2014-05-16(#3) |
| B-400 | 74 | 52.33 | McCauley, Denzel (2015) (Carbondale Comm, IL) | Murphysboro Boys Invitational(IL), 2014-04-19(#3) |
| B-400 | 74 | 52.33 | Mannino, Nolan (2014) (Waterloo, IL) | IL 2A Herrin Boys Sectional(IL), 2014-05-22(#7) |
| B-400 | 76 | 52.35 | Hernandez, Cesar (North Boone, IL) | IL 1A Oregon Boys Sectional(IL), 2014-05-23(#3) |
| B-400 | 77 | 52.40 | Deters, Justin (2014) (Tolono Unity, IL) | Okaw Valley Boys Conference Meet(IL), 2014-05-12(#3) |
| B-400 | 78 | 52.41 | Beard, Josh (2015) (Geneseo, IL) | McCormick ABC Invitational(IL), 2014-05-09(#3) |
| B-400 | 79 | 52.43 | Lopez, Eduardo (2016) (Rantoul, IL) | Gene Ward Invitational(IL), 2014-05-02(#5) |
| B-400 | 80 | 52.44 | Perkins, Devante (Springfield Southeast, IL) | Springfield Boys City Meet(IL), 2014-05-06(#6) |
| B-400 | 81 | 52.49 | Arther, Greg (2014) (Richmond-Burton, IL) | Big Northern Conf Boys Championship(IL), 2014-05-15(#5) |
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| | | See more performances for B-400 | | |
