State titles
Football
Football is based on an 8 class system since 2001.
Plano (2006 3A, 2007 3A)
Coal City (1993 2A)
Seneca (1990 2A)
Wilmington (2014 3A)
Boys baseball
- Lisle (2013 2A)
- Wilmington (2003, 2005)
- Reed-Custer (1985) (2016)
- Herscher (1999) (2015)
Wrestling
- Wilmington (2007, 2008, 2009)
- Sandwich (1991, 1997, 1999, 2001)
- Reed-Custer (2010,2012)
Boys basketball
- Seneca (2005–06 A)
Boys golf
- Dwight (1980)
Boys soccer
- Lisle (2010 1A)
Girls soccer
- Manteno (2009 1A)
Competitive cheerleading
- Dwight (2013)
- Wilmington(2016)
Competitive Dance Team
- Peotone (2012 1A)
Boys cross country
Cross Country is based on a 3 class system since 2007.
- Seneca (1989 A)
Girls cross country
Cross Country is based on a 3 class system since 2007.
- Herscher (1991 A, 1992 A, 1996 A)
Girls track and field
- Herscher (1996)
Girls softball
- Coal City (2010)
Girls volleyball
- Lisle (1985)
Scholastic Bowl
Lisle (2011, 2012)
