Grayslake Central High School

Grayslake Central High School is a four-year high school of heavily attended scale in Grayslake, Illinois, overseen by Grayslake CHSD 127, enrolling 1,375 students in grades 9 through 12. Compared to the state average of about 834 students per school, that is 65% bigger than typical.

Grayslake Central High School is one of 2 schools operated by Grayslake CHSD 127, a district that educates 2,583 students overall.

Looking at the student body, Grayslake Central High School reports that the largest single group is White, at 58% of enrollment; the rest is composed of 22% Hispanic, 8% Asian, 6% Black, 5% multiracial. Compared to Lake County overall, the school's racial mix sits in roughly the same range.

On the resource side, Staff filings list 106 full-time-equivalent teachers, which works out to roughly 12.9:1 students per teacher. The state averages around 13.8:1, so this campus is tighter than the state norm typical.

In the broader community, the surrounding county (Lake County) reports that median household income runs about $110,416, roughly 48% of adults have completed at least a four-year degree, and roughly 6% of residents live below the federal poverty line. Grayslake Central High School is one of 214 public schools in Lake County (combined enrollment of about 118,032 students).

Grayslake Middle School is the nearest neighboring public school, about 0.5 miles from this campus. 8 of the 8 nearest public schools sit inside a five-mile radius.

The campus sits in an outer-ring setting.

Looking at the recent track record. Over the past 7-year window, the student count held roughly steady: 1,353 students in 2018 compared to 1,375 in 2025. The student-to-teacher ratio narrowed from 14.5:1 in 2018 to 12.9:1 today.

On this page, members of the Grayslake Central High School community share and discuss classroom updates, athletics, and weather closures. Members of the school community can share what they know.