| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 48.72 | Olsen, Ryan (2013) (Burlington Central, IL) | IL 2A Sterling Boys Sectional(IL), 2013-05-17(#1) |
| B-400 | 1 | 48.72 | Brady, Marlin (2014) (Cahokia, IL) | IL 2A Salem Boys Sectional(IL), 2013-05-16(#1) |
| B-400 | 3 | 48.93 | Hunter, Martel (2014) (Monmouth-Roseville, IL) | IL 1A Sherrard Boys Sectional(IL), 2013-05-17(#1) |
| B-400 | 4 | 49.22 | Kucera, Nathaniel (2014) (Kaneland , IL) | IL 2A Sterling Boys Sectional(IL), 2013-05-17(#2) |
| B-400 | 5 | 49.29 | Chapman, Leroy (2013) (Antioch, IL) | Crystal Lake Central Boys Invitational(IL), 2013-04-26(#1) |
| B-400 | 6 | 49.42 | Williams, Aquintis (2013) (MacArthur, IL) | Solon Lion Open(IL), 2013-04-09(#2) |
| B-400 | 7 | 49.58 | Watson, Jeremiah (2014) (Urban Prep Englewood, IL) | IL 2A Boys State Finals(IL), 2013-05-25(#3) |
| B-400 | 8 | 49.60 | Robinson, Jaylen (2013) (Freeport, IL) | IL 2A Sterling Boys Sectional(IL), 2013-05-17(#4) |
| B-400 | 9 | 49.69 | Kelley, Byron (2013) (Brooks College Prep Academy, IL) | IL 2A Thornridge Boys Sectional(IL), 2013-05-16(#1) |
| B-400 | 10 | 49.72 | Holiday, Jalen (2013) (De La Salle Institute, IL) | Paul Wallace Invitational(IL), 2013-07-20(#1) |
| B-400 | 11 | 49.86 | Adeyemo, Moshood (2013) (Hillcrest, IL) | Bill Jackson Invitational(IL), 2013-05-03(#1) |
| B-400 | 12 | 49.98 | Jordan, Deshawn (2013) (North Lawndale Charter, IL) | IL 2A Fenwick Boys Sectional(IL), 2013-05-16(#1) |
| B-400 | 13 | 50.05 | Riley, Brandon (2014) (Morgan Park, IL) | IL 2A Boys State Prelims(IL), 2013-05-24(#7) |
| B-400 | 14 | 50.12 | Hooker, Dion (2015) (Sycamore, IL) | NIB-12 Conference Boys(IL), 2013-05-10(#2) |
| B-400 | 15 | 50.19 | Ryan, Jack (2013) (Evergreen Park, IL) | IL 2A Fenwick Boys Sectional(IL), 2013-05-16(#2) |
| B-400 | 16 | 50.20 | Monigan, Jalon (2014) (Cahokia, IL) | St. Clair County Boys Championships(IL), 2013-04-30(#3) |
| B-400 | 17 | 50.22 | Allen, Damion (2014) (LaSalle-Peru, IL) | PJS Honor Roll Meet(IL), 2013-05-22(#1) |
| B-400 | 18 | 50.38 | Ruff, Matt (2014) (Wheaton Academy, IL) | Suburban Christian Conference Boys(IL), 2013-05-08(#1) |
| B-400 | 18 | 50.38 | Landry, Tayvonne (2014) (Carbondale Comm, IL) | IL 2A Boys State Prelims(IL), 2013-05-24(#11) |
| B-400 | 20 | 50.48 | Horton, Grayson (2013) (Joliet Catholic Academy, IL) | East Suburban Catholic Conference Boys(IL), 2013-05-09(#1) |
| B-400 | 21 | 50.49 | Thomas, Darius (2013) (Macomb, IL) | PJS Honor Roll Meet(IL), 2013-05-22(#2) |
| B-400 | 22 | 50.51 | Chupp, Matthew (2013) (Mahomet-Seymour, IL) | Mahomet-Seymour Boys Invitational(IL), 2013-05-11(#1) |
| B-400 | 23 | 50.57 | Johnson, Devin (2013) (Erie-Prophetstown, IL) | IL 1A Boys State Prelims(IL), 2013-05-23(#7) |
| B-400 | 24 | 50.64 | Reschke, Ethan (2013) (Geneseo, IL) | IL 2A Plano Boys Sectional(IL), 2013-05-17(#2) |
| B-400 | 25 | 50.65 | LaFayette, J.D. (2014) (Normal University, IL) | Bloomington-Normal Inter City Classic - Boys(IL), 2013-04-24(#1) |
| B-400 | 26 | 50.76 | Smith, Sidney (2013) (Woodstock North, IL) | IL 2A Vernon Hills Boys Sectional(IL), 2013-05-17(#3) |
| B-400 | 27 | 50.80 | Mays, Brian (2013) (Rich South, IL) | USATF Region 7 Junior Olympics(IL), 2013-07-14(#4) |
| B-400 | 27 | 50.80 | Johnson, Conor (2013) (Kaneland , IL) | NIB-12 Conference Boys(IL), 2013-05-10(#3) |
| B-400 | 29 | 50.90 | Lyons, Tyran (2016) (Cahokia, IL) | Edwardsville F/S Tiger Invitational(IL), 2013-04-04(#1) |
| B-400 | 29 | 50.90 | Geiger, Kiente (2013) (Thornridge, IL) | Blue Smoke Invitational(IL), 2013-04-06(#3) |
| B-400 | 31 | 51.00 | Boss, Steven (2013) (Mount Vernon, IL) | IL 2A Salem Boys Sectional(IL), 2013-05-16(#4) |
| B-400 | 32 | 51.04 | Riggs, Grant (2015) (Highland, IL) | Mississippi Valley Conference Boys(IL), 2013-05-08(#1) |
| B-400 | 33 | 51.14 | Ervin, Sharod (2014) (Richwoods, IL) | IL 3A Rock Island Boys Sectional(IL), 2013-05-17(#4) |
| B-400 | 34 | 51.23 | Pasley, Blake (2013) (Rochester, IL) | Central State 8 Conf Boys(IL), 2013-05-10(#3) |
| B-400 | 35 | 51.28 | Carter, Kyle (2014) (Kaneland , IL) | Kiwannis ABC Invitational(IL), 2013-04-06(#1) |
| B-400 | 36 | 51.30 | Thomas, Cedric (2013) (Mascoutah, IL) | Mississippi Valley Conference Boys(IL), 2013-05-08(#2) |
| B-400 | 37 | 51.31 | Danner, Nick (2013) (Metamora, IL) | Mid Illini Conference Boys(IL), 2013-05-07(#2) |
| B-400 | 38 | 51.44 | Crawford, Aaron (Tinley Park, IL) | IL 2A Thornridge Boys Sectional(IL), 2013-05-16(#4) |
| B-400 | 39 | 51.47 | Bigelow, Matt (2014) (Carterville, IL) | IL 1A Fairfield Boys Sectional(IL), 2013-05-16(#2) |
| B-400 | 40 | 51.53 | McManis, Davion (2014) (Dunlap, IL) | Mid Illini Conference Boys(IL), 2013-05-07(#3) |
| B-400 | 41 | 51.54 | VanDyke, Noah (2015) (Wheaton Academy, IL) | Suburban Christian Conference Boys(IL), 2013-05-08(#3) |
| B-400 | 42 | 51.72 | Vroegh, Kevin (2014) (Illiana Christian, IL) | Chicago Christian Invitational(IL), 2013-04-26(#4) |
| B-400 | 43 | 51.73 | Haynes, Joshua (2015) (Marian Catholic, IL) | USATF JO IL Assc Champs(IL), 2013-06-23(#1) |
| B-400 | 43 | 51.73 | Shroyer, Andrew (2013) (Mahomet-Seymour, IL) | Corn Belt Conference Championships(IL), 2013-05-06(#1) |
| B-400 | 45 | 51.77 | Mcgee, Chris (2016) (Cahokia, IL) | IL 2A Salem Boys Sectional(IL), 2013-05-16(#6) |
| B-400 | 46 | 51.80 | Pagan, Alex (2013) (Hampshire, IL) | Jacobs Boys Triangular(IL), 2013-04-08(#2) |
| B-400 | 47 | 51.81 | Patrick, Kyle (2013) (Antioch, IL) | IL 2A Vernon Hills Boys Sectional(IL), 2013-05-17(#5) |
| B-400 | 48 | 51.84 | Worby, Bryan (2015) (Pontiac, IL) | Roger Washburn Invitational(IL), 2013-04-26(#2) |
| B-400 | 49 | 51.86 | White, Evan (2014) (Rochelle, IL) | NIB-12 Conference Boys(IL), 2013-05-10(#6) |
| B-400 | 50 | 51.88 | McCauley, Denzel (2015) (Carbondale Comm, IL) | IL 2A Salem Boys Sectional(IL), 2013-05-16(#7) |
| B-400 | 51 | 51.94 | Kasten, Sam (2013) (Vernon Hills, IL) | IL 2A Vernon Hills Boys Sectional(IL), 2013-05-17(#6) |
| B-400 | 52 | 51.99 | Walker, Jonathon (2016) (Glenbard South, IL) | Glenbard South Boys Open(IL), 2013-04-06(#1) |
| B-400 | 53 | 52.06 | Bolfing, Austin (2015) (Taylorville, IL) | IL 2A Lanphier Boys Sectional(IL), 2013-05-17(#5) |
| B-400 | 54 | 52.08 | Wise, Andrew (2013) (Benet Academy, IL) | IL 2A Fenwick Boys Sectional(IL), 2013-05-16(#4) |
| B-400 | 55 | 52.09 | Gowdy, Timothy (2013) (North Lawndale Charter, IL) | Chicago Public League Championships(IL), 2013-05-04(#7) |
| B-400 | 56 | 52.12 | Porter, Andrew (2014) (Normal University, IL) | IL 2A Boys State Prelims(IL), 2013-05-24(#21) |
| B-400 | 57 | 52.13 | Crespo, Evan (2013) (Dunlap, IL) | Mid Illini Conference Boys(IL), 2013-05-07(#4) |
| B-400 | 58 | 52.18 | Ekstrom, Cody (2014) (Aurora Central Catholic, IL) | Suburban Christian Conference Boys(IL), 2013-05-08(#4) |
| B-400 | 59 | 52.20 | Clark, Devante (2014) (Jacksonville, IL) | Granite City Invitational(IL), 2013-04-12(#4) |
| B-400 | 60 | 52.23 | Lamendola, Alexander (2014) (Dixon, IL) | NIB-12 Conference Boys(IL), 2013-05-10(#8) |
| B-400 | 61 | 52.31 | Wheatley, Monterious (2015) (Springfield Southeast, IL) | Lanphier F/S Boys Invitational(IL), 2013-05-07(#1) |
| B-400 | 62 | 52.32 | Akuoko, Kwadjo (2014) (Springfield Southeast, IL) | Springfield Boys City Meet(IL), 2013-04-30(#2) |
| B-400 | 63 | 52.35 | Mcmorrow, Ryan (2013) (Metamora, IL) | Mid Illini Conference Boys(IL), 2013-05-07(#5) |
| B-400 | 63 | 52.35 | Johnson, Tyler (2015) (St. Rita, IL) | Chicago Catholic League F/S Championships(IL), 2013-05-03(#2) |
| B-400 | 65 | 52.39 | Yarborough, Keenan (2013) (Limestone Community, IL) | PJS Honor Roll Meet(IL), 2013-05-22(#3) |
| B-400 | 66 | 52.47 | Deters, Justin (2014) (Tolono Unity, IL) | IL 1A Tolono Unity Boys Sectional(IL), 2013-05-17(#2) |
| B-400 | 67 | 52.48 | Hohlfelder, Sam (2014) (Mahomet-Seymour, IL) | Corn Belt Conference Championships(IL), 2013-05-06(#2) |
| B-400 | 68 | 52.49 | Barrio, Jose (2015) (Rockford Christian, IL) | AAU Area 14 National Qualifier(IL), 2013-06-09(#11) |
| B-400 | 68 | 52.49 | Portor, Andrew (Normal University, IL) | Mahomet-Seymour Boys Invitational(IL), 2013-05-11(#2) |
| B-400 | 70 | 52.50 | Hupp, Chad (Thornridge, IL) | Terry Englund Relays(IL), 2013-04-20(#4) |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | See more performances for B-400 | | |
