The North Suburban League or NSL is a long established competitive league consisting of 14 large public high schools in the far north suburbs of Chicago (most located in Lake County). All of these schools are eligible to compete in the "large school" Class AA of the Illinois High School Association (IHSA).
IHSA State Place Winners
||Stevenson (2000, 2005, 2010)
||Stevenson (2004, 2008)
||Libertyville (1997), Stevenson (2001, 2009, 2011)