Collinsville High School

Collinsville High School is a high school of well-populated scale in Collinsville, Illinois, part of Collinsville CUSD 10, serveing 1,956 students in grades 9 through 12. Compared to the state average of about 834 students per school, that is 135% larger than typical.

Collinsville CUSD 10 comprises 11 schools with combined enrollment of 6,110 students; Collinsville High School is among them.

For racial and ethnic makeup, Collinsville High School shows that 53% of students identify as White, with the remaining enrollment distributed across several groups; the rest comes out to 28% Hispanic, 14% Black, 6% multiracial.

Looking at the economic backdrop, Collinsville High School lists 132 full-time-equivalent teachers, putting the student-to-teacher ratio at about 14.9:1. The state averages around 13.8:1, so this campus is higher than the state norm typical. About 66% of enrolled students meet the income threshold for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. That share is noticeably above St. Clair County's rate of about 54%.

On a residual basis (actual vs predicted given the student mix), Collinsville High School tracks the demographic baseline. The model predicts 33.2% given the school's FRL share; actual proficiency is 34.3%.

In the area at large, ACS estimates for St. Clair County put median household earnings sit near $73,854, 32% of adults hold a bachelor's degree or higher, and roughly 10% of residents live below the federal poverty line. In all, St. Clair County runs 96 public schools (combined enrollment of about 40,879 students), of which Collinsville High School is one.

The closest other public school is Twin Echo Elem School, roughly 0.8 miles away. Counting just inside five miles, 8 other public schools cluster around Collinsville High School. Ranking that nearby cluster on reported proficiency puts Collinsville High School at 3rd of 8; the average score across the group is 35.2%.

The school occupies a bedroom-community site.

Looking at the recent track record. Looking back 7 years, enrollment at Collinsville High School has ticked up 4%, going from 1,885 students in 2018 to 1,956 in 2025. White enrollment moved from 65% to 53% across the same window. The student-to-teacher ratio tightened from 16.2:1 in 2018 to 14.9:1 today.

In the discussion threads here, the page collects discussion, questions, and updates around open house dates, ride-share offers, and field-trip permission slips. Contributors range from current parents to recent graduates and teachers.