| Event | Rank | Mark | By | Meet |
| B-400 | 1 | 46.24 | Montgomery, Kahmari (2015) (Plainfield Central, IL) (US#8) | IL 3A Boys State Finals(IL), 2015-05-30(#1) |
| B-400 | 2 | 47.45 | Davis, Roosevelt (2016) (East St. Louis-Senior, IL) (US#46) | Great Southwest Classic(NM), 2015-06-06(#3) |
| B-400 | 3 | 47.53 | Hertz, Cory (2015) (Lakes, IL) (US#51) | IL 3A Boys State Finals(IL), 2015-05-30(#2) |
| B-400 | 4 | 47.73 | Wells, Octavian (2016) (Grant Community, IL) (US#70) | IL 3A Boys State Prelims(IL), 2015-05-29(#5) |
| B-400 | 5 | 47.81 | Espinosa, Zac (2015) (Neuqua Valley, IL) (US#83) | Red Ribbon Classic(IL), 2015-05-02(#1) |
| B-400 | 6 | 47.99 | Thompson, Chris (2016) (Lemont, IL) | USATF Youth National Championships 17-18(IL), 2015-07-05(#4) |
| B-400 | 7 | 48.02 | Mccray, Demontez (2015) (O'Fallon, IL) | IL 3A Boys State Prelims(IL), 2015-05-29(#6) |
| B-400 | 8 | 48.04 | Klamm, Carl (2015) (Evanston Township, IL) | IL 3A Boys State Prelims(IL), 2015-05-29(#3) |
| | | National Elites above. State Elites below | | |
| B-400 | 9 | 48.27 | Strange, Steven (2016) (Oswego, IL) | IL 3A Plainfield North Boys Sectional(IL), 2015-05-21(#2) |
| B-400 | 10 | 48.39 | Eiker, Josh (2016) (Galesburg, IL) | United Township Kiwanis Invitational(IL), 2015-04-11(#1) |
| B-400 | 11 | 48.56 | Spearman, Emanuel (2015) (Homewood-Flossmoor, IL) | IL 3A Homewood-Flossmoor Boys Sectional(IL), 2015-05-21(#1) |
| B-400 | 12 | 48.94 | Moss, Ty (2015) (Neuqua Valley, IL) | Red Ribbon Classic(IL), 2015-05-02(#2) |
| B-400 | 13 | 48.97 | Garron, Brad (2017) (Evanston Township, IL) | USATF JO Region 7 Qualifier(IL), 2015-07-12(#1) |
| B-400 | 14 | 49.00 | Bush, John (2015) (Crystal Lake Central, IL) | USATF Junior Olympics National Championships 17-18(FL), 2015-08-02(#9) |
| B-400 | 15 | 49.07 | Edwards, Michael (2016) (Zion-Benton Twnshp, IL) | IL 3A Palatine Boys Sectional(IL), 2015-05-21(#2) |
| B-400 | 15 | 49.07 | Miranda, Nick (2017) (Lincoln-Way North, IL) | Southwest Suburban Red Boys Conference Meet(IL), 2015-05-14(#1) |
| B-400 | 17 | 49.09 | Piron, Peyton (2015) (Batavia, IL) | Kane County Boys Championships(IL), 2015-05-09(#1) |
| B-400 | 18 | 49.14 | Robinson, Isaiah (2017) (Neuqua Valley, IL) | USATF JO Region 7 Qualifier(IL), 2015-07-12(#2) |
| B-400 | 19 | 49.16 | Mikel, Pat (2016) (Glenbard East, IL) | IL 3A Boys State Prelims(IL), 2015-05-29(#11) |
| B-400 | 20 | 49.17 | Anderson, Deante (2018) (East St. Louis-Senior, IL) | IL 3A Boys State Prelims(IL), 2015-05-29(#12) |
| B-400 | 21 | 49.26 | Forrest, Dajour (2016) (Normal Community West, IL) | Big 12 Boys Conference Meet(IL), 2015-05-12(#2) |
| B-400 | 22 | 49.39 | Brown, Jibreel (2016) (Carl Sandburg, IL) | IL 3A Downers Grove South Boys Sectional(IL), 2015-05-22(#2) |
| B-400 | 23 | 49.41 | Kelly, Devon (2016) (St. Charles East, IL) | IL 3A Boys State Prelims(IL), 2015-05-29(#15) |
| B-400 | 24 | 49.45 | Foster, Antwon (2016) (Prosser Career Academy, IL) | IL 3A Boys State Prelims(IL), 2015-05-29(#16) |
| B-400 | 25 | 49.49 | Wade, Barrington (2016) (Niles North, IL) | Springfield Boys Open(IL), 2015-04-04(#1) |
| B-400 | 26 | 49.54 | Borchardt, George (2015) (Bradley-Bourbonnais, IL) | IL 3A Boys State Prelims(IL), 2015-05-29(#17) |
| B-400 | 27 | 49.55 | Vestuto, Tim (2015) (Adlai E Stevenson, IL) | IL 3A Palatine Boys Sectional(IL), 2015-05-21(#3) |
| B-400 | 28 | 49.64 | Williams, Jaquere (2017) (Waubonsie Valley, IL) | AAU Junior Olympics National Championships 15-16(VA), 2015-08-08(#8) |
| B-400 | 29 | 49.67 | Goodwin, Kyle (2016) (Lincoln-Way North, IL) | IL 3A Homewood-Flossmoor Boys Sectional(IL), 2015-05-21(#4) |
| B-400 | 30 | 49.69 | Carter, Jarvis (2016) (Plainfield East, IL) | Gans Zeedyk Invitational(IL), 2015-04-11(#1) |
| B-400 | 30 | 49.69 | Lima, Alex (2015) (Lyons Township, IL) | Minooka Boys Invitational(IL), 2015-04-18(#1) |
| B-400 | 32 | 49.71 | Chapman, Peyton (2015) (Bolingbrook, IL) | USATF IL Assc JO Championships(IL), 2015-06-28(#4) |
| B-400 | 33 | 49.73 | Komlanc, Joe (2016) (St. Charles East, IL) | IL 3A West Aurora Boys Sectional(IL), 2015-05-21(#2) |
| B-400 | 34 | 49.76 | Svoboda, Kyle (2015) (John Hersey, IL) | IL 3A Loyola Academy Boys Sectional(IL), 2015-05-21(#2) |
| B-400 | 35 | 49.81 | Warren, Johnathon (2015) (Bloomington, IL) | Bloomington Honor Roll Meet(IL), 2015-05-26(#1) |
| B-400 | 36 | 49.82 | Miller, John (2015) (Loyola Academy, IL) | IL 3A Loyola Academy Boys Sectional(IL), 2015-05-21(#3) |
| B-400 | 37 | 49.84 | Adams, Brandon (2018) (Minooka Community, IL) | USATF Youth National Championships 15-16(IL), 2015-07-05(#1) |
| B-400 | 37 | 49.84 | Gaines, Jawan (2015) (Fremd, IL) | Palatine Relays(IL), 2015-05-02(#1) |
| B-400 | 37 | 49.84 | Simpson, Matthew (2015) (Homewood-Flossmoor, IL) | USATF IL Assc JO Championships(IL), 2015-06-28(#6) |
| B-400 | 40 | 49.93 | Buchanan, Deshon (2016) (Belleville West, IL) | Granite City Invitational(IL), 2015-04-17(#3) |
| B-400 | 41 | 49.97 | Mcdaniel, Tifonte (2016) (Thornton Township, IL) | LWW Warrior Invitational(IL), 2015-05-01(#3) |
| B-400 | 42 | 49.98 | Melynchuk, Brandon (2015) (Barrington, IL) | Palatine Relays(IL), 2015-05-02(#2) |
| B-400 | 43 | 50.02 | Rodriguez, Alex (2015) (Brother Rice, IL) | Oak Lawn Invitational(IL), 2015-04-18(#1) |
| B-400 | 44 | 50.05 | Walker, Isaac (2015) (Warren Township, IL) | Deerfield Boys Invitational(IL), 2015-04-11(#1) |
| B-400 | 44 | 50.05 | Bell, Brandon (2016) (Wheaton-Warrenville South, IL) | Wheaton North Best 4 Invitational(IL), 2015-04-11(#1) |
| B-400 | 46 | 50.10 | Treadwell, Juwaun (2017) (Crete-Monee, IL) | Blue Smoke Invitational(IL), 2015-04-11(#1) |
| B-400 | 47 | 50.11 | Eiring, Konrad (2015) (Barrington, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#1) |
| B-400 | 48 | 50.21 | Gleeson, Robbie (2016) (Cary-Grove Community, IL) | Fox Valley Boys Conference meet(IL), 2015-05-15(#1) |
| B-400 | 49 | 50.25 | Streater, Tremain (2016) (Collinsville, IL) | IL 3A Normal West Boys Sectional(IL), 2015-05-22(#5) |
| B-400 | 50 | 50.29 | Parker, Tavolis (2015) (J Sterling Morton, IL) | IL 3A Lyons Township Boys Sectional(IL), 2015-05-22(#1) |
| B-400 | 50 | 50.29 | Alston, David (2016) (Centennial, IL) | IL 2A Boys State Finals(IL), 2015-05-30(#7) |
| B-400 | 52 | 50.31 | Cuevas, Adrian (2016) (Jefferson, IL) | NIC-10 Boys Conference Meet(IL), 2015-05-15(#1) |
| B-400 | 53 | 50.32 | Perkins, Chauncie (2015) (DeKalb, IL) | Gib Seegers Invitational(IL), 2015-05-01(#2) |
| B-400 | 54 | 50.37 | Ferguson, Carey (2017) (Bloomington, IL) | IL 3A Normal West Boys Sectional(IL), 2015-05-22(#6) |
| B-400 | 55 | 50.38 | Smith, Angel (2016) (Proviso West, IL) | WSC-Silver Boys Conference Meet(IL), 2015-05-16(#1) |
| B-400 | 55 | 50.38 | Hutsalyuk, Pavlo (2015) (Lane Technical, IL) | CPS Boys Varsity Trials(IL), 2015-05-06(#1) |
| B-400 | 57 | 50.45 | Sager, Kevin (2016) (Neuqua Valley, IL) | Metea Valley Boys Invitational(IL), 2015-04-18(#1) |
| B-400 | 57 | 50.45 | Jordan, Brian (2016) (Hinsdale South, IL) | Mike Yavorski Hornet Invitational(IL), 2015-05-01(#2) |
| B-400 | 59 | 50.49 | Wright-Madison, Chris (2015) (Oak Park-River Forest, IL) | WSC-Silver Boys Conference Meet(IL), 2015-05-16(#2) |
| B-400 | 60 | 50.55 | O'Donnell, Brendan (2016) (Huntley, IL) | Fox Valley Boys Conference meet(IL), 2015-05-15(#2) |
| B-400 | 61 | 50.56 | Ma, Kevin (2015) (Whitney Young, IL) | CPS Boys Varsity Trials(IL), 2015-05-06(#6) |
| B-400 | 61 | 50.56 | Rogers, Dylan (2016) (Harry D Jacobs, IL) | Gus Scott Co-Ed Invitational(IL), 2015-04-17(#1) |
| B-400 | 63 | 50.58 | Taylor, Mike (2018) (Downers Grove North, IL) | IL 3A Downers Grove South Boys Sectional(IL), 2015-05-22(#3) |
| B-400 | 64 | 50.61 | Smith, Will (2017) (Crete-Monee, IL) | AAU Central District Qualifier(IL), 2015-06-14(#4) |
| B-400 | 65 | 50.62 | Bello, Anthony (2016) (Homewood-Flossmoor, IL) | AAU Central District Qualifier(IL), 2015-06-14(#5) |
| B-400 | 66 | 50.65 | Lewis, Kyle (2015) (Fremd, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#1) |
| B-400 | 67 | 50.66 | Speer, Daniel (2015) (Cary-Grove Community, IL) | Fox Valley Boys Conference meet(IL), 2015-05-15(#3) |
| B-400 | 68 | 50.77 | Murphy, Josan (2016) (Willowbrook, IL) | WSC-Gold Boys Conference Meet(IL), 2015-05-15(#3) |
| B-400 | 68 | 50.77 | Rhodes, Sanchez (2018) (Belleville East, IL) | Marion Freeman Invitational(MO), 2015-05-02(#6) |
| B-400 | 70 | 50.82 | Glass, Christian (2015) (Plainfield East, IL) | Southwest Prairie Boys Conference Meet(IL), 2015-05-14(#3) |
| B-400 | 71 | 50.83 | Zaley, Ben (2016) (Schaumburg, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#3) |
| B-400 | 72 | 50.84 | Brown, Isaiah (2016) (Marmion Academy, IL) | IL 3A West Aurora Boys Sectional(IL), 2015-05-21(#3) |
| B-400 | 73 | 50.85 | McCue, Connor (2016) (West Aurora, IL) | West Aurora Boys Triangular(IL), 2015-04-28(#1) |
| B-400 | 74 | 50.86 | Elmore, Tyler (2017) (Bolingbrook, IL) | Southwest Suburban Blue Boys Conference Meet(IL), 2015-05-14(#4) |
| B-400 | 75 | 50.89 | Davis, Antonio (2017) (Bloom Township, IL) | Winston Brown Invitational(IL), 2015-04-25(#3) |
| B-400 | 76 | 50.90 | McKenzie, Marvin (2015) (Riverside-Brookfield, IL) | Metro Suburban West Boys Conference Meet(IL), 2015-05-15(#1) |
| B-400 | 77 | 50.96 | Davila, Luis (2015) (Jefferson, IL) | NIC-10 Boys Conference Meet(IL), 2015-05-15(#2) |
| B-400 | 77 | 50.96 | Roberson, Tyler (Homewood-Flossmoor, IL) | USATF JO Region 7 Qualifier(IL), 2015-07-12(#5) |
| B-400 | 79 | 50.99 | Jones, Duwayne-Patriq (2017) (Hononegah, IL) | AAU JO Region 13 Qualifier(IL), 2015-07-05(#4) |
| B-400 | 79 | 50.99 | Bazai, Suleman (2015) (Edwardsville, IL) | Madison County Championships(IL), 2015-04-28(#1) |
| B-400 | 81 | 51.00 | Graham, Rayshawn (2016) (Eisenhower , IL) | South Suburban Red Boys Conference Meet(IL), 2015-05-14(#1) |
| B-400 | 82 | 51.04 | Malinowski, Mike (2016) (Minooka Community, IL) | Southwest Prairie Boys Conference Meet(IL), 2015-05-14(#5) |
| B-400 | 83 | 51.06 | Agee, Jacobi (2016) (Bloom Township, IL) | USATF Youth National Championships 17-18(IL), 2015-07-05(#18) |
| B-400 | 84 | 51.07 | Edgerton, Trevor (2015) (Lyons Township, IL) | Minooka Boys Invitational(IL), 2015-04-18(#4) |
| B-400 | 85 | 51.09 | Mafany, Nelson (2016) (Niles North, IL) | CSL-North Boys Conference Meet(IL), 2015-05-15(#2) |
| B-400 | 86 | 51.10 | Arroyo, Aaron (2018) (Minooka Community, IL) | Belleville West Boys Invitational(IL), 2015-04-11(#7) |
| B-400 | 87 | 51.16 | Quinn, Pat (2015) (Libertyville, IL) | Al Janulis Relays(IL), 2015-04-18(#2) |
| B-400 | 87 | 51.16 | Gilchrese, Ronald (2016) (Alton, IL) | Southwest Boys Conference Meet(IL), 2015-05-13(#4) |
| B-400 | 89 | 51.18 | Magee, Arnold (2015) (Waukegan , IL) | CSL-South Boys Conference Meet(IL), 2015-05-15(#2) |
| B-400 | 90 | 51.21 | Lillard, Dan (2016) (Hinsdale Central, IL) | IL 3A Downers Grove South Boys Sectional(IL), 2015-05-22(#5) |
| B-400 | 91 | 51.23 | Swallow, Jacob (Lincoln-Way Central, IL) | IL 3A Homewood-Flossmoor Boys Sectional(IL), 2015-05-21(#6) |
| B-400 | 92 | 51.24 | Jefferson, Martaviyon (2016) (Rockford East, IL) | NIC-10 Boys Conference Meet(IL), 2015-05-15(#3) |
| B-400 | 93 | 51.28 | Elms, Nick (2016) (Conant, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#3) |
| B-400 | 94 | 51.30 | Warren, Heath (2016) (Springfield, IL) | Springfield Boys Triangular(IL), 2015-04-02(#1) |
| B-400 | 95 | 51.32 | Beech, Conrad (2016) (Harry D Jacobs, IL) | Fox Valley Boys Conference meet(IL), 2015-05-15(#4) |
| B-400 | 95 | 51.32 | Cason, Ni'Zarien (Belleville West, IL) | Southwest Boys Conference Meet(IL), 2015-05-13(#5) |
| B-400 | 97 | 51.33 | Spates, Aquil (2017) (Glenbard North, IL) | DuPage Valley Boys Conference Meet(IL), 2015-05-15(#1) |
| B-400 | 98 | 51.35 | Griffin, Nate (2016) (Providence Catholic, IL) | Chicago Catholic League Championships(IL), 2015-05-16(#4) |
| B-400 | 98 | 51.35 | Christiansen, Jared (2015) (Hononegah, IL) | Northern Illinois Invitational(IL), 2015-05-08(#1) |
| B-400 | 100 | 51.37 | Hollis, Russel (2018) (East St. Louis-Senior, IL) | Southwest Boys Conference Meet(IL), 2015-05-13(#2) |
| B-400 | 101 | 51.40 | Burke, Charles (2017) (Waubonsie Valley, IL) | Upstate Eight Boys Conference Meet(IL), 2015-05-14(#5) |
| B-400 | 101 | 51.40 | Terrini, Adam (2016) (Wheaton North, IL) | DuPage Valley Boys Conference Meet(IL), 2015-05-15(#2) |
| B-400 | 103 | 51.41 | Yonker, Josh (2015) (Harry D Jacobs, IL) | Gus Scott Co-Ed Invitational(IL), 2015-04-17(#1) |
| B-400 | 104 | 51.43 | Swallow, Jake (2015) (Lincoln-Way Central, IL) | Southwest Suburban Red Boys Conference Meet(IL), 2015-05-14(#5) |
| B-400 | 105 | 51.44 | Bamgbose, Babajide (2016) (Evanston Township, IL) | IL 3A Loyola Academy Boys Sectional(IL), 2015-05-21(#4) |
| B-400 | 106 | 51.45 | Perakis, Jake (2017) (Bolingbrook, IL) | IL 3A Downers Grove South Boys Sectional(IL), 2015-05-22(#6) |
| B-400 | 107 | 51.47 | Garcia, Carlos (Argo Community, IL) | South Suburban Red Boys Conference Meet(IL), 2015-05-14(#2) |
| B-400 | 108 | 51.48 | Mcneal, Deondre (2016) (Prosser Career Academy, IL) | Chicago Public League City Championships(IL), 2015-05-09(#4) |
| B-400 | 108 | 51.48 | Gage, Brandon (2017) (Oak Park-River Forest, IL) | USATF Youth National Championships 17-18(IL), 2015-07-05(#20) |
| B-400 | 110 | 51.49 | Balliu, Jake (2015) (Lakes, IL) | Bartlett Flyin Hawk Invitational(IL), 2015-04-18(#3) |
| B-400 | 110 | 51.49 | Shattuck, Forest (2016) (Belvidere North, IL) | IL 3A Guilford Boys Sectional(IL), 2015-05-21(#4) |
| B-400 | 112 | 51.50 | Parthemore, Ryan (2015) (Carl Sandburg, IL) | Pete Struck Eagle Classic(IL), 2015-05-01(#6) |
| B-400 | 112 | 51.50 | Sampson, Jacob (2016) (Neuqua Valley, IL) | AAU JO Region 13 Qualifier(IL), 2015-07-05(#7) |
| B-400 | 114 | 51.51 | Mollman, Tim (2015) (New Trier Township, IL) | Gus Scott Co-Ed Invitational(IL), 2015-04-17(#2) |
| B-400 | 115 | 51.53 | Reilly, James (2015) (Hinsdale Central, IL) | LWW Warrior Invitational(IL), 2015-05-01(#5) |
| B-400 | 115 | 51.53 | Buck, Zeke (2016) (Geneva, IL) | Kane County Boys Championships(IL), 2015-05-09(#5) |
| B-400 | 117 | 51.55 | Ruscitti, Alex (2015) (Plainfield North, IL) | Belleville West Boys Invitational(IL), 2015-04-11(#10) |
| B-400 | 118 | 51.56 | Meier, Matthew (2016) (Naperville Central, IL) | DuPage Valley Boys Conference Meet(IL), 2015-05-15(#3) |
| B-400 | 119 | 51.57 | Wilson, Doug (2016) (Rock Island, IL) | Dick Beebe Track Classic(IL), 2015-04-18(#5) |
| B-400 | 119 | 51.57 | Agyake, TJ (2016) (Naperville North, IL) | DuPage Valley Boys Conference Meet(IL), 2015-05-15(#4) |
| B-400 | 119 | 51.57 | Lever, Jack (2015) (Edwardsville, IL) | Southwest Boys Conference Meet(IL), 2015-05-13(#6) |
| B-400 | 122 | 51.62 | Arroyo, Gabe (2016) (Yorkville, IL) | IL 3A Plainfield North Boys Sectional(IL), 2015-05-21(#4) |
| B-400 | 122 | 51.62 | Best, Andrew (2016) (Lyons Township, IL) | WSC-Silver Boys Conference Meet(IL), 2015-05-16(#3) |
| B-400 | 122 | 51.62 | McMahon, Ryan (2016) (Fremd, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#4) |
| B-400 | 122 | 51.62 | Watson, Collin (2015) (Evanston Township, IL) | Jim Arnold Classic(IL), 2015-05-02(#5) |
| B-400 | 126 | 51.66 | Rodgers, Derrius (2016) (Lockport Township , IL) | Southwest Suburban Blue Boys Conference Meet(IL), 2015-05-14(#5) |
| B-400 | 126 | 51.66 | Jones, Adetunji (2016) (Bloomington, IL) | Mike Yavorski Hornet Invitational(IL), 2015-05-01(#4) |
| B-400 | 126 | 51.66 | Pearson, Tyler (2017) (Pekin Community, IL) | IL 3A Normal West Boys Sectional(IL), 2015-05-22(#7) |
| B-400 | 129 | 51.67 | Hamilton, Tommy (2015) (Lincoln-Way East, IL) | Carlin Nalley Invitational(IL), 2015-05-09(#6) |
| B-400 | 130 | 51.69 | Eufrasio, Nick (Willowbrook, IL) | WSC-Gold Boys Conference Meet(IL), 2015-05-15(#4) |
| B-400 | 130 | 51.69 | Rustay, Declan (2018) (Hoffman Estates, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#4) |
| B-400 | 132 | 51.70 | Cinq-Mars, Zack (2016) (Grayslake Central, IL) | Lake County Boys Championships(IL), 2015-05-09(#6) |
| B-400 | 133 | 51.71 | Stegall, Keenan (2016) (Alton, IL) | IL 3A Normal West Boys Sectional(IL), 2015-05-22(#8) |
| B-400 | 134 | 51.74 | Koehler, Connor (2015) (Lemont, IL) | Carlin Nalley Invitational(IL), 2015-05-09(#7) |
| B-400 | 135 | 51.76 | Cernek, Gavin (2016) (Glenbrook South, IL) | CSL-South Boys Conference Meet(IL), 2015-05-15(#5) |
| B-400 | 135 | 51.76 | Denley, Jackson (2015) (Niles West, IL) | CSL-South Boys Conference Meet(IL), 2015-05-15(#5) |
| B-400 | 137 | 51.77 | Suarez, Greg (2015) (Prospect, IL) | MSL-East Boys Divisional Championship(IL), 2015-04-28(#1) |
| B-400 | 138 | 51.78 | Torpy, Chris (2016) (Carl Sandburg, IL) | IL 3A Downers Grove South Boys Sectional(IL), 2015-05-22(#7) |
| B-400 | 139 | 51.80 | Szkaradek, Peter (2016) (Lake Park, IL) | DuPage Valley Boys Conference Meet(IL), 2015-05-15(#5) |
| B-400 | 139 | 51.80 | Bloss, Michael (2015) (Wheaton North, IL) | IL 3A York Boys Sectional(IL), 2015-05-22(#5) |
| B-400 | 141 | 51.81 | Harris, Jevais (2016) (Hinsdale South, IL) | Bud Mohns Invitational(IL), 2015-04-18(#5) |
| B-400 | 142 | 51.82 | Moran, Luke (2016) (Oswego, IL) | Roger Wilcox Invitational(IL), 2015-05-01(#1) |
| B-400 | 143 | 51.85 | Deal, Austin (2016) (Plainfield South, IL) | USATF JO Region 7 Qualifier(IL), 2015-07-12(#1) |
| B-400 | 144 | 51.86 | Sherwood, Kevin (2017) (Prospect, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#5) |
| B-400 | 145 | 51.88 | Smith, Eddie (Springfield, IL) | Central State Eight Boys Conference Meet(IL), 2015-05-15(#2) |
| B-400 | 146 | 51.92 | Bender, Kyle (2015) (Neuqua Valley, IL) | IL 3A Plainfield North Boys Sectional(IL), 2015-05-21(#5) |
| B-400 | 147 | 51.93 | Amen, Luke (2017) (Glenbrook North, IL) | CSL-North Boys Conference Meet(IL), 2015-05-15(#3) |
| B-400 | 148 | 51.94 | Mosley, Thomas (2017) (Zion-Benton Twnshp, IL) | Jane Dickens Invitational(IL), 2015-06-20(#1) |
| B-400 | 149 | 51.96 | Gibson, Chris (2015) (Lane Technical, IL) | Dan Horyn Invitational(IL), 2015-04-24(#1) |
| B-400 | 150 | 52.00 | Johnson, Dontae (2015) (O'Fallon, IL) | Southwest Boys Conference Meet(IL), 2015-05-13(#7) |
| B-400 | 151 | 52.01 | Kiska, Mitchell (2017) (Plainfield East, IL) | IL 3A Plainfield North Boys Sectional(IL), 2015-05-21(#6) |
| B-400 | 152 | 52.02 | Loza, Luis (2015) (Romeoville, IL) | Terry Englund Relays(IL), 2015-04-23(#3) |
| B-400 | 152 | 52.02 | Flores, Randy (2016) (Jefferson, IL) | Gib Seegers Invitational(IL), 2015-05-01(#4) |
| B-400 | 152 | 52.02 | Bauman, Spencer (2016) (Waubonsie Valley, IL) | Gus Scott Co-Ed Invitational(IL), 2015-04-17(#3) |
| B-400 | 155 | 52.05 | Heinz, Kristoffer (2017) (Naperville North, IL) | Rolling Meadows Mustang Classic(IL), 2015-05-01(#1) |
| B-400 | 155 | 52.05 | Henry, Michael (2017) (Evanston Township, IL) | CSL-South Boys Conference Meet(IL), 2015-05-15(#1) |
| B-400 | 155 | 52.05 | Lyons, Avery (Bloomington, IL) | Bloomington/Normal Intercity Classic(IL), 2015-04-28(#3) |
| B-400 | 158 | 52.06 | Gray, Adam (2016) (Downers Grove South, IL) | WSC-Gold Boys Conference Meet(IL), 2015-05-15(#5) |
| B-400 | 159 | 52.07 | Phillips, Bradley (2016) (Joliet Central, IL) | Illinois Sprint Spectacular(IL), 2015-06-06(#2) |
| B-400 | 159 | 52.07 | Arroyo, Luis (2015) (Yorkville, IL) | AAU Central District Qualifier(IL), 2015-06-14(#4) |
| B-400 | 159 | 52.07 | Gay, Jalil (2018) (Rock Island, IL) | Western Big Six Boys Conference Meet(IL), 2015-05-15(#2) |
| B-400 | 162 | 52.08 | Young, James (2018) (East St. Louis-Senior, IL) | Fred Lyons Invitational(MO), 2015-04-24(#2) |
| B-400 | 162 | 52.08 | Nicoletti, Jack (2016) (Barrington, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#5) |
| B-400 | 162 | 52.08 | Cagigal, Jordan (2016) (Metea Valley, IL) | Red Grange Invitational(IL), 2015-04-24(#4) |
| B-400 | 165 | 52.09 | Swanson, Brian (2015) (Oak Forest, IL) | IL 2A Hillcrest Boys Sectional(IL), 2015-05-22(#4) |
| B-400 | 166 | 52.10 | Stainback, Tyshawn (2015) (East St. Louis-Senior, IL) | Southwest Boys Conference Meet(IL), 2015-05-13(#8) |
| B-400 | 167 | 52.11 | Hillegass, Alex (2016) (Normal Community West, IL) | Belleville West Boys Invitational(IL), 2015-04-11(#12) |
| B-400 | 168 | 52.12 | Ehringer, Brad (Plainfield South, IL) | Minooka Boys Invitational(IL), 2015-04-18(#6) |
| B-400 | 169 | 52.13 | Favela, Eduardo (Providence Catholic, IL) | CCL F/S Championships(IL), 2015-05-07(#1) |
| B-400 | 170 | 52.15 | Guzman, Cesar (2016) (Plainfield South, IL) | Wheaton North Best 4 Invitational(IL), 2015-04-11(#2) |
| B-400 | 170 | 52.15 | Bienduga, Alex (2016) (Wheaton North, IL) | DuPage Valley Boys Conference Meet(IL), 2015-05-15(#6) |
| B-400 | 172 | 52.18 | Pruett, Austin (Plainfield South, IL) | Southwest Prairie Boys Conference Meet(IL), 2015-05-14(#1) |
| B-400 | 173 | 52.20 | Spikener, Haneef (2017) (Waubonsie Valley, IL) | AAU Central District Qualifier(IL), 2015-06-14(#5) |
| B-400 | 174 | 52.21 | Hill, Delvin (2018) (Belleville East, IL) | Collinsville Boys Invitational(IL), 2015-05-09(#9) |
| B-400 | 175 | 52.22 | Gray, Chance (2015) (Quincy, IL) | IL 3A Normal West Boys Sectional(IL), 2015-05-22(#10) |
| B-400 | 175 | 52.22 | Divinere, Vince (2017) (Glenbard West, IL) | Jim Arnold Classic(IL), 2015-05-02(#1) |
| B-400 | 175 | 52.22 | Turpin, Victor (2015) (Minooka Community, IL) | Minooka Boys Quad(IL), 2015-04-30(#1) |
| B-400 | 178 | 52.24 | Boyer, Wilkins (2015) (Brother Rice, IL) | Chicago Catholic League Championships(IL), 2015-05-16(#5) |
| B-400 | 179 | 52.25 | Mitchell, Demitius (2015) (Thornton Township, IL) | USATF IL Assc JO Championships(IL), 2015-06-28(#17) |
| B-400 | 179 | 52.25 | Terry, Justin (2015) (Thornton Township, IL) | John Bell Invitational(IL), 2015-04-18(#5) |
| B-400 | 181 | 52.27 | Cossio, Luis (Barrington, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#1) |
| B-400 | 181 | 52.27 | Hall, Jake (2014) (Hinsdale Central, IL) | IL 3A Loyola Academy Boys Sectional(IL), 2015-05-21(#5) |
| B-400 | 183 | 52.30 | James, Kameron (2016) (Proviso East, IL) | Palatine Relays(IL), 2015-05-02(#5) |
| B-400 | 184 | 52.31 | Mcmarrow, Charles (2017) (Batavia, IL) | IL 3A West Aurora Boys Sectional(IL), 2015-05-21(#4) |
| B-400 | 184 | 52.31 | Peterson, Thomas (2015) (Libertyville, IL) | IL 3A Palatine Boys Sectional(IL), 2015-05-21(#6) |
| B-400 | 184 | 52.31 | Osei, Jon (2015) (Downers Grove South, IL) | WSC-Gold Boys Conference Meet(IL), 2015-05-15(#6) |
| B-400 | 187 | 52.32 | Prueter, Josh (2015) (Wheaton-Warrenville South, IL) | DuPage Valley Boys Conference Meet(IL), 2015-05-15(#7) |
| B-400 | 187 | 52.32 | Sykes, Korey (Lincoln-Way North, IL) | EIU Race At State(IL), 2015-05-29(#2) |
| B-400 | 189 | 52.33 | Santoro, Arthur (2017) (Jones College Prep, IL) | Lane Tech Boys Quintangular(IL), 2015-04-16(#1) |
| B-400 | 190 | 52.34 | Zieba, Mat (Rolling Meadows, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#2) |
| B-400 | 191 | 52.35 | Harness, Alex (2016) (United Township, IL) | Western Big Six Boys Conference Meet(IL), 2015-05-15(#3) |
| B-400 | 191 | 52.35 | Ngo, Stephen (2015) (Whitney Young, IL) | CPS Boys Varsity Trials(IL), 2015-05-06(#9) |
| B-400 | 193 | 52.36 | Dell'Aquilla, Trevor (2016) (Huntley, IL) | IL 3A Guilford Boys Sectional(IL), 2015-05-21(#6) |
| B-400 | 194 | 52.39 | Jones, Duron (2017) (O'Fallon, IL) | St. Clair County Boys Championships(IL), 2015-04-28(#7) |
| B-400 | 194 | 52.39 | Everly, Josh (2015) (Normal Community, IL) | Bloomington/Normal Intercity Classic(IL), 2015-04-28(#5) |
| B-400 | 196 | 52.40 | Greenleaf, Devin (2015) (Highland Park, IL) | CSL-North Boys Conference Meet(IL), 2015-05-15(#4) |
| B-400 | 196 | 52.40 | Williams, Cameron (Glenwood, IL) | Central State Eight Boys Conference Meet(IL), 2015-05-15(#3) |
| B-400 | 198 | 52.41 | Sutton, Randy (2015) (Joliet West, IL) | Southwest Suburban Blue Boys Conference Meet(IL), 2015-05-14(#9) |
| B-400 | 199 | 52.42 | Eubanks, Connor (2016) (Pekin Community, IL) | Pekin Dragon Invitational(IL), 2015-05-01(#2) |
| B-400 | 199 | 52.42 | Mbaye, Makhtar (2016) (Moline, IL) | Tim Holt Invitational(IL), 2015-05-08(#1) |
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