Since its formation in 1917, Warren Township High School District 121 has grown and evolved with its residents.

From a one-story building on O'Plaine Road to two campuses located about 4.5 miles apart, Warren has seen graduating initial classes of about 25 students in the beginning to more than 1000 today.

All students and staff moved to the Lake Forest West Campus where Warren Township High School existed from January 1985 to June 1987.

With enrollment continuing to increase, a second campus for Warren Township High School opened in 1997 for juniors and seniors.

The last major construction project was partially completed in 2008 which included a renovation of the Almond Campus lunchroom.

A 3 million dollar project that converted the black box theater into a larger seating area for students.