| 1. | 12 | | Antonio Farley | 47.95a | IL | Round Lake | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 2. | 11 | | Kenneth Allen | 48.33a | IL | South Holland (Thornwood) | IHSA Boys Class AAA State Finals | Sat, May 26 |
| 3. | 12 | | Kaleb Williams | 48.43a | IL | Chicago Heights (Bloom Twp.) | IHSA Boys Class AAA State Finals | Sat, May 26 |
| 4. | 11 | | Malik Harrison | 48.50a | IL | Springfield | IHSA Boys Class AAA State Finals | Sat, May 26 |
| 5. | 12 | | Jacob Bender | 48.75a | IL | Naperville (Neuqua Valley) | Upstate 8 Valley Division Conference Meet | Thu, May 10 |
| 6. | 12 | | Jake Mazanke | 48.77a | IL | St. Charles (East) | John Bell Invitation | Sat, Apr 14 |
| 7. | 12 | | Dalton Timm | 48.90a | IL | Springfield | Springfield Boy's City Meet | Tue, May 1 |
| 12 | | Stepfan Thelemaque | 48.90a | IL | Plainfield (East) | IHSA 3A Boys Sectional - Naperville North | Thu, May 17 |
| 9. | 12 | | Tommy Rohn | 49.02a | IL | Cary-Grove | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 10. | 12 | | Dakarai Howard | 49.08a | IL | Chicago (Whitney Young) | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 11. | 11 | | Jeff Broger | 49.11a | IL | South Elgin | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 12. | 12 | | Quest Young | 49.16a | IL | Plainfield (North) | SPC Boys Championships | Thu, May 10 |
| 13. | 11 | | Michael Gleeson | 49.30a | IL | Cary-Grove | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 14. | 12 | | Tevin Hopkins | 49.42a | IL | Minooka | SPC Boys Championships | Thu, May 10 |
| 15. | 12 | | Mike Rantis | 49.43a | IL | Lake Zurich | IHSA AAA Sectional Meet @ Fremd | Fri, May 18 |
| 16. | 11 | | Deshaun Jordan | 49.44a | IL | Chicago (North Lawndale Charter) | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 17. | 12 | | Colin Johnson | 49.47a | IL | Joliet (West) | John Bell Invitation | Sat, Apr 14 |
| 18. | 12 | | Stedman Foster | 49.53a | IL | Chicago (Morgan Park) | IHSA 3A Saint Ignatius Sectional | Thu, May 17 |
| 19. | 12 | | Ryan Moredock | 49.63a | IL | Peoria (Richwoods) | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 20. | 10 | | Chris Wilson | 49.64a | IL | Minooka | SPC Boys Championships | Thu, May 10 |
| 21. | 11 | | Zach Kirby | 49.65a | IL | St. Charles (North) | IHSA Boys Sectional - St Charles N | Thu, May 17 |
| 12 | | Kendric Cornelius | 49.65a | IL | Palatine | IHSA AAA Sectional Meet @ Fremd | Fri, May 18 |
| 23. | 11 | | Justin Davis | 49.77a | IL | Geneva | Upstate Eight Boys River Division | Thu, May 10 |
| 24. | 9 | | Paul Ifianayi | 49.80a | IL | Elk Grove Village (E.G) | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 25. | 12 | | Marquis Flowers | 49.88a | IL | Plainfield (North) | SPC Boys Championships | Thu, May 10 |
| 26. | 11 | | Cameron DeCoursey | 49.94c | IL | Wheeling | Glenbrook South Invite | Fri, May 4 |
| 12 | | Kerry Kohlbacher | 49.94a | IL | Crystal Lake (Prairie Ridge) | IHSA 3A Sectional | Thu, May 17 |
| 28. | 12 | | Peter Bremhorst | 49.96a | IL | Springfield | Collinsville Invite | Sat, May 5 |
| 29. | 12 | | Jalen Bonner | 50.01a | IL | Plainfield (South) | SPC Boys Championships | Thu, May 10 |
| 30. | 12 | | Phabian Clark | 50.04a | IL | Wheaton (W. Warrenville South) | IHSA AAA Sectional | Fri, May 18 |
| 31. | 10 | | Sam Bransby | 50.09a | IL | Naperville (Central) | DVC Boys Conference | Fri, May 11 |
| 32. | 12 | | James Davis | 50.14a | IL | Huntley | IHSA 3A Sectional | Thu, May 17 |
| 12 | | Tyler Haines | 50.14c | IL | Naperville (Central) | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 34. | 12 | | Michael Gulan | 50.16a | IL | Chicago (Von Steuben) | IHSA 3A Sectional | Thu, May 17 |
| 35. | 10 | | Matt Burns | 50.18a | IL | Villa Park (Willowbrook) | IHSA AAA Sectional | Fri, May 18 |
| 36. | 12 | | Ben Bouie | 50.27a | IL | Blue Island (Eisenhower) | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 37. | 12 | | Austin Ameri | 50.30a | IL | Aurora (Waubonsie Valley) | Upstate 8 Valley Division Conference Meet | Thu, May 10 |
| 38. | 12 | | Will King | 50.34a | IL | Aurora (Metea Valley) | Upstate 8 Valley Division Conference Meet | Thu, May 10 |
| 39. | 12 | | Bryant Lewis | 50.36a | IL | Bloomington | Big 12 Conference Championship | Thu, May 10 |
| 40. | 11 | | John Burke | 50.39a | IL | Aurora (Waubonsie Valley) | DuPage County Invitational - Boys | Fri, May 4 |
| 41. | 12 | | Matt Trainor | 50.41a | IL | Chicago (Mt. Carmel) | IHSA 3A Saint Ignatius Sectional | Thu, May 17 |
| 42. | 11 | | Antonio Abreu | 50.45a | IL | Chicago (Lane) | *CPS Varsity Championships | Sat, May 5 |
| 43. | 12 | | Ryan Gundersen | 50.49a | IL | Rolling Meadows | Northern Illinois Invite | Fri, May 4 |
| 44. | 11 | | Micaiah Steele | 50.50a | IL | Wheaton (North) | DVC Boys Conference | Fri, May 11 |
| 45. | 12 | | Alex Kasemir | 50.57a | IL | Highland Park | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 46. | 10 | | Adam Milsap | 50.62a | IL | Naperville (North) | Red Grange Invite - Boys | Fri, Apr 20 |
| 47. | 10 | | Dayquon Jones | 50.64a | IL | Rock Island | Western Big Six Boys Conference | Thu, May 10 |
| 48. | 11 | | Juwaan Richard | 50.76a | IL | Schaumburg | Streamwood Invite | Sat, Apr 21 |
| 49. | 10 | | Anthony McLeod | 50.80a | IL | Harvey (Thornton) | John Bell Invitation | Sat, Apr 14 |
| 50. | 11 | | Todd Flamer | 50.81a | IL | East Moline (United) | Western Big Six Boys Conference | Thu, May 10 |
| 51. | 12 | | Gabe Snider | 50.84a | IL | Chicago (Whitney Young) | *CPS Varsity Championships | Sat, May 5 |
| 52. | - | | Taylor Click | 50.85a | IL | Lake Forest | Illinois Prep Top Times Multi Events | Fri, Jun 1 |
| 53. | 10 | | Daniel Spaccapaniccia | 50.86a | IL | Naperville (Central) | IHSA 3A Boys Sectional - Naperville North | Thu, May 17 |
| 54. | 12 | | Cyrus French | 50.88a | IL | Elgin (Larkin) | Kane County Boys | Fri, May 4 |
| 12 | | Christian Magee | 50.88a | IL | Normal (Community West) | Big 12 Conference Championship | Thu, May 10 |
| 56. | 11 | | Deon Carter | 50.89a | IL | Oak Lawn (Richards) | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 57. | 12 | | Phil Partipilo | 50.90a | IL | Addison (A. Trail) | IHSA AAA Sectional | Fri, May 18 |
| 58. | 11 | | Pat Klamm | 50.91a | IL | Evanston (Twp.) | Red Grange Invite - Boys | Fri, Apr 20 |
| 59. | 10 | | Jujan Askew | 51.09a | IL | East St. Louis (Sr.) | Marion Freeman Invitational | Sat, Apr 28 |
| 60. | 12 | | Ahmad Williams | 51.12a | IL | Normal (Community) | Big 12 Conference Championship | Thu, May 10 |
| 12 | | Nick Nissen | 51.12a | IL | Crystal Lake (Prairie Ridge) | IHSA 3A Sectional | Thu, May 17 |
| 12 | | Pat Prasak | 51.12a | IL | Addison (A. Trail) | IHSA AAA Sectional | Fri, May 18 |
| 63. | 12 | | Connor Furlong | 51.14c | IL | Hinsdale (Central) | McCarthy Memorial Track Invitaitional | Fri, May 4 |
| 64. | 10 | | Cole Henderson | 51.18a | IL | Pekin | MI Conference - BOYS | Tue, May 8 |
| 65. | 11 | | Ben Jackson | 51.19a | IL | East Moline (United) | Western Big Six Boys Conference | Thu, May 10 |
| 66. | 11 | | Nick Simmonds | 51.22a | IL | Belleville (West) | Eastern Relays | Fri, Apr 27 |
| 10 | | David Lenzini | 51.22a | IL | Crystal Lake (South) | IHSA 3A Sectional | Thu, May 17 |
| 68. | 12 | | Justin Smith | 51.27a | IL | Chicago (Payton) | IHSA 3A Saint Ignatius Sectional | Thu, May 17 |
| 69. | 11 | | Richard Leon | 51.28a | IL | Des Plaines (Maine West) | IHSA 3A Sectional | Thu, May 17 |
| 70. | 12 | | Joshua Conley | 51.29a | IL | Summit (Argo) | IHSA 3A Saint Ignatius Sectional | Thu, May 17 |
| 71. | 10 | | Matt Roche | 51.31a | IL | Moline | Western Big Six Boys Conference | Thu, May 10 |
| 72. | 12 | | Adam Rabushka | 51.32a | IL | Deerfield | Bartlett Flying Hawk Invite | Sat, Apr 14 |
| 12 | | Carter Reading | 51.32a | IL | St. Charles (East) | John Bell Invitation | Sat, Apr 14 |
| 12 | | Matt Filipiak | 51.32a | IL | Frankfort (Lincoln-Way North) | IHSA Boys Class 3A Sectional | Thu, May 17 |
| 75. | 12 | | Vontrel Hawkins | 51.36a | IL | Aurora (West) | Kane County Boys | Fri, May 4 |
| 10 | | Michael Hill | 51.36a | IL | Rockton (Hononegah) | IHSA 3A Sectional | Thu, May 17 |
| 77. | - | | Cody Hokanson | 51.39a | IL | Tinley Park (Andrew) | IHSA Boys Class 3A Sectional | Thu, May 17 |
| 78. | 10 | | James Harriel | 51.40a | IL | Chicago Heights (Bloom Twp.) | Boys' SAC Championships | Wed, May 9 |
| 79. | 11 | | Julius Garcia | 51.46a | IL | Naperville (Neuqua Valley) | Upstate 8 Valley Division Conference Meet | Thu, May 10 |
| 80. | 12 | | Charlie Wiley | 51.48a | IL | Chicago (Kenwood) | *CPS Varsity Championships | Sat, May 5 |
| 11 | | Josh Whitcomb | 51.48a | IL | Belvidere (North) | NIC-10 Boys Conference Championships | Fri, May 11 |
| 82. | 12 | | Remigio Hernandez | 51.51a | IL | Machesney Park (Harlem) | NIC-10 Boys Conference Championships | Fri, May 11 |
| 83. | 12 | | Travon Harris | 51.54c | IL | Chicago (Dunbar) | Dunbar Invite #4 | Wed, Apr 25 |
| 84. | 12 | | Chris Khoury | 51.55a | IL | Elmhurst (York) | DuPage County Invitational - Boys | Fri, May 4 |
| 85. | - | | Quinten Nash | 51.63a | IL | Olympia Fields (Rich Central) | IHSA Boys Class 3A Sectional | Thu, May 17 |
| 12 | | Craig Benner | 51.63a | IL | Villa Park (Willowbrook) | IHSA AAA Sectional | Fri, May 18 |
| 87. | 11 | | Timothy Gowdy | 51.64c | IL | Chicago (North Lawndale Charter) | Saint Ignatius Invitational Only #1 | Wed, Apr 18 |
| 88. | 11 | | Jontrel Smith | 51.73a | IL | Harvey (Thornton) | IHSA Boys Class 3A Sectional | Thu, May 17 |
| 89. | 11 | | Jeff Markham | 51.75a | IL | Aurora (Waubonsie Valley) | IHSA 3A Boys Sectional - Naperville North | Thu, May 17 |
| 90. | 12 | | Stephen Papierski | 51.76a | IL | Wheaton (North) | DVC Boys Conference | Fri, May 11 |
| 91. | 12 | | Mike Hyatte | 51.81a | IL | Rockford (Jefferson) | IHSA 3A Sectional | Thu, May 17 |
| 92. | 11 | | Danny Newman | 51.82a | IL | St. Charles (East) | Kane County Boys | Fri, May 4 |
| 93. | 11 | | Clage Dodson | 51.83a | IL | Pekin | Dragon Invite | Fri, Apr 27 |
| 11 | | Nick Paoletti | 51.83a | IL | Carol Stream (Glenbard North) | IHSA AAA Sectional | Fri, May 18 |
| 95. | 12 | | Nate Echt | 51.85a | IL | Highland Park | IHSA 3A Sectional | Thu, May 17 |
| 96. | 12 | | Kerry Dean | 51.86a | IL | Chicago (Mt. Carmel) | IHSA 3A Saint Ignatius Sectional | Thu, May 17 |
| 12 | | Miles Fountain | 51.86a | IL | Oak Park (O.P.-River Forest) | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 98. | 12 | | Josh Holm | 51.87a | IL | McHenry | IHSA 3A Sectional | Thu, May 17 |
| 99. | 9 | | Zac Espinosa | 51.90a | IL | Naperville (Neuqua Valley) | Upstate 8 Valley Division Conference Meet | Thu, May 10 |
| 100. | 12 | | Greg Aubain | 51.92a | IL | Skokie (Niles West) | IHSA 3A Sectional | Thu, May 17 |
| 101. | 12 | | Josh Reel | 51.94c | IL | Bradley-Bourbonnais | Thornridge Invite | Sat, Apr 7 |
| 102. | 12 | | Brad Kouchoukos | 52.04c | IL | Naperville (Central) | IHSA Class 3A Boys State Prelims | Fri, May 25 |
| 103. | 12 | | Wisam Abunimeh | 52.05a | IL | Gurnee (Warren) | IHSA AAA Sectional Meet @ Fremd | Fri, May 18 |
| 104. | 11 | | Demonte Hill | 52.06a | IL | Evanston (Twp.) | Red Grange Invite - Boys | Fri, Apr 20 |
| 9 | | Isaiah Ellis | 52.06a | IL | Rock Island | Western Big Six Boys Conference | Thu, May 10 |
| 10 | | Cosme Bailon | 52.06a | IL | Bensenville (Fenton) | Metro Suburban Conference Championships | Fri, May 11 |
| 12 | | Derek Heer | 52.06a | IL | Rolling Meadows | Mid Suburban Conference Meet (MSL) Boys | Fri, May 11 |
| 12 | | Tyler Herman | 52.06a | IL | Gurnee (Warren) | IHSA AAA Sectional Meet @ Fremd | Fri, May 18 |
| 109. | 10 | | Tim Roels | 52.09a | IL | Geneva | Upstate Eight Boys River Division | Thu, May 10 |
| 110. | 11 | | Dan Miklosz | 52.13a | IL | LaGrange (Lyons) | IHSA 3A Saint Ignatius Sectional | Thu, May 17 |
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(Total stats: 773)
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