2023
- 1st Place - Maine South High School
- 2nd Place - Normal Community West High School
- 3rd Place - College Preparatory School of America (CPSA)
2022
- 1st Place - Timothy Christian High School
- 2nd Place - Niles West High School
- 3rd Place - Adlai Stevenson High School
2021
- 1st place – Evanston Township High School
- 2nd place – College Preparatory School of America
- 3rd place – Timothy Christian High School
2019
- 1st place – York Community High School
- 2nd place – Glenbard East High School
- 3rd place – Evanston Township High School
2018
- 1st place – St. Charles North High School
- 2nd place – York Community High School
- 3rd place – Hinsdale Central High School
2017
- 1st Place – St. Charles North High School
- 2nd Place – Timothy Christian High School
- 3rd Place – Hinsdale Central High School
2016
- 1st place – Timothy Christian High School
- 2nd place – St. Charles North High School
- 3rd place – Chicago Christian High School
2015
- 1st place – Hinsdale Central
- 2nd place – St. Charles North
- 3rd place – Chicago Christian
2014
- 1st place - St. Charles North
- 2nd place - Hinsdale Central
- 3rd place - Chicago Christian
2013
- 1st place - Hinsdale Central, Hinsdale
- 2nd place - St. Charles North, St. Charles
- 3rd place - Timothy Christian, Elmhurst
2012
- 1st place - Hinsdale Central, Hinsdale
- 2nd place - Timothy Christian, Elmhurst
- 3rd place - St. Charles North, St. Charles
2011
- 1st place - Chatham Glenwood High School, Chatham
- 2nd place - Timothy Christian High School, Elmhurst
- 3rd place - (tie) Glenbard East, Lombard and Hinsdale Central, Hinsdale
2010
- 1st place - Hinsdale Central High School, Hinsdale
- 2nd place - Evanston Township High School, Evanston
- 3rd place - York High School, Elmhurst
- 4th place - Timothy Christian High School, Elmhurst
2009
- 1st Place - Hinsdale Central High School, Hinsdale
- 2nd Place Tie – Glenbard East High School, Lombard and Glenbard South High School, Glen Ellyn
- 3rd Place – Chicago Christian High School, Palos Heights
2008
- 1st place - Highland Park High School
- 2nd place - Boylan Catholic High School
- 3rd place - Timothy Christian High School
2007
- 1st place - Glenbard East
- 2nd place - Mundelein
- 3rd place - Boylan Catholic and Timothy Christian
2006
- 1st place - Timothy Christian High School
- 2nd place - Glenbard South High School
- 3rd place - Boylan Catholic High School
2005
- 1st Place - Hinsdale Central High School, Hinsdale
- 2nd Place - Oak Park River Forest High School, Oak Park
- 3rd Place - Boylan Catholic High School, Rockford
2004
- 1st Timothy Christian High School of Elmhurst
- 2nd Boylan Catholic of Rockford
- 3rd Oak Park River Forest High School & St. Charles East High School
2003
- 1st Timothy Christian, Elmhurst
- 2nd St. Charles East, St. Charles
- 3rd Boylan Catholic, Rockford & York High School, Elmhurst
2002
- 1st Timothy Christian High School
- 2nd York High School
- 3rd St. Charles East
2001
1st Boylan Catholic, Rockford
2nd Wells, Chicago
3rd Timothy Christian, Elmhurst
2000
- 1st Timothy Christian High School, Elmhurst
- 2nd Hinsdale Central High School, Hinsdale
- 3rd Glenbard South High School, Glen Ellyn
1999
- 1st Boylan Catholic High School, Rockford
- 2nd Timothy Christian High School, Elmhurst
- 3rd Glenbard South High School, Glen Ellyn
1998
- 1st Timothy Christian High School, Elmhurst
- 2nd Hinsdale Central High School, Hinsdale
- 3rd Glenbard South High School, Glen Ellyn
1997
- 1st Glenbard South High School, Glen Ellyn
- 2nd Timothy Christian High School, Elmhurst
- 3rd Larkin High School, Elgin
1996
- 1st Hinsdale Central High School
- 2nd Hirsch Metro High School
- 3rd Boylan Catholic High School
1995
- 1st Mt. Vernon High School
- 2nd Glenbard South High School
- 3rd Hinsdale Central High School
1994
- 1st Hinsdale Central High School
- 2nd Glenbard South High School
- 3rd Oak Park High School
1993
- 1st Glenbard South
- 2nd Timothy Christian
- 3rd Hinsdale Central
1992
- 1st Glenbard South
- 2nd Hinsdale Central
- 3rd Larkin
1991
- 1st Hinsdale Central
- 2nd Glenbard South
- 3rd Kenwood Academy
1990
- 1st Hinsdale Central
- 2nd Kenwood Academy
- 3rd Larkin
1989
- 1st St. Charles
- 2nd Hinsdale Central
- 3rd Glenbrook South
1988
- 1st Hinsdale Central
- 2nd Glenbrook South
- 3rd Lincoln Park (first year third year ranking announced)
1987
- 1st Marion Central Catholic
- 2nd Chatham Glenwood & Hinsdale Central
1986
- 1st Glenbard South
- 2nd Freeport
1985
1st Glenbard South
1984
Carbondale and Glenbard South were finalists – no winners announced
1983
First year of ISBA mock trials - no winners announced