Baseball - 1991, 1992, 1994, 2004, 2005
Boys basketball - 1996, 2010
Girls basketball
Boys cross country - 2003, 2004
Girls cross country - 2007, 2008
Football - 1996, 1997, 2004, 2006
Boys golf - 1990, 1991, 1992, 1993, 1994, 1995, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Girls golf - 1989, 1994, 2004, 2006, 2007, 2009
Gymnastics - 1994, 1996, 1997, 1998, 2000, 2010
Hockey - 2002, 2006, 2008, 2009
Boys soccer - 1996, 1998, 1999, 2001, 2003, 2005, 2006, 2009
Girls soccer - 1999, 2000, 2005, 2006, 2007, 2009, 2010
Softball - 1991, 1996
Boys tennis - 1998, 1999, 2000, 2001, 2008, 2009
Girls tennis - 1991, 1992, 2008, 2009
Boys track and field - 2003
Girls track and field - 1999
Volleyball - 1998
Wrestling
78 total championships in 17 sports
*Central and Onalaska are tied for having won conference championships in 17 of the 19 sports