Illinois High School Football Computer Rankings: September 15, 2025

Check out the latest Illinois high school football computer rankings for every classification as of September 15, 2025

Lincoln-Way East Griffins vs Kankakee Kays, 2025 / Dean Reid

Another week of the 2025 Illinois high school football season has come and gone, and High School On SI has all of the latest computer rankings as of September 15, 2025.

High School On SI's formula was created using its own linear algebra-based ranking algorithm inspired by the Colley Bias-Free Ranking Method. Colley’s Method was created by Wes Colley, Ph.D., an astrophysicist at the University of Alabama at Huntsville. He devised his algorithm in order to help address the subjectivity and controversy regarding BCS college football selections in the 1990s and early 2000s, using a method that used no subjective variables.

Our computer rankings run parallel to High School On SI's expert power rankings — the statewide Top 25 — released early each week.

The No. 1-ranked team in the all-classification High School On SI Illinois Top 25 is also the No. 1-ranked team in our computer rankings, Chicago Mt. Carmel.

Here are High School On SI's latest Illinois high school football computer rankings, as of September 15, 2025:

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IHSA High School Football Rankings

1. Chicago Mt. Carmel (3-0)

2. Loyola Academy (2-0)

3. Macomb (4-0)

4. Richmond-Burton (3-0)

5. Morris (3-0)

6. Rochester (3-0)

7. Marshall (3-0)

8. Evergreen Park (3-0)

9. Vandalia (3-0)

10. Farmington (4-0)

11. St. Charles North (3-0)

12. Belvidere North (3-0)

13. Lincoln-Way East (3-0)

14. St. Laurence (3-0)

15. Yorkville (3-0)

16. Barrington (3-0)

17. Polo (3-0)

18. Fremd (3-0)

19. Freeburg (3-0)

20. Glenbard West (3-0)

21. Belleville East (3-0)

22. Brother Rice (3-0)

23. Goode STEM Academy (3-0)

24. Hoffman Estates (3-0)

25. Alden-Hebron (3-0)

26. Frankfort (3-0)

27. Lane Tech (3-0)

28. Casey-Westfield (3-0)

29. Zion-Benton (4-0)

30. El Paso-Gridley (3-0)

31. Byron (3-0)

32. Downers Grove North (3-0)

33. Carterville (3-0)

34. Carl Sandburg (3-0)

35. Marengo (3-0)

36. Lincoln-Way West (3-0)

37. MacArthur (3-0)

38. Galena (5-0)

39. Oak Forest (3-0)

40. Quincy Notre Dame (3-0)

41. East Moline United (3-0)

42. Milledgeville (4-0)

43. Lyons (3-0)

44. Prairie Ridge (3-0)

45. Richland County (3-0)

46. Payton College Prep (3-0)

47. Camp Point Central (3-0)

48. Chicago Sullivan (3-0)

49. St. Joseph-Ogden (3-0)

50. Arthur-Lovington/Atwood-Hammond (3-0)

View full computer rankings

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